+++ /dev/null
-/*
- * producer_avformat.c -- avformat producer
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
- * Much code borrowed from ffmpeg.c: Copyright (c) 2000-2003 Fabrice Bellard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-// MLT Header files
-#include <framework/mlt_producer.h>
-#include <framework/mlt_frame.h>
-#include <framework/mlt_profile.h>
-
-// ffmpeg Header files
-#include <avformat.h>
-#include <opt.h>
-#ifdef SWSCALE
-# include <swscale.h>
-#endif
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
-# include "audioconvert.h"
-#endif
-
-// System header files
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include <math.h>
-
-#if LIBAVUTIL_VERSION_INT < (50<<16)
-#define PIX_FMT_YUYV422 PIX_FMT_YUV422
-#endif
-
-void avformat_lock( );
-void avformat_unlock( );
-
-// Forward references.
-static int producer_open( mlt_producer this, mlt_profile profile, char *file );
-static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index );
-
-/** Constructor for libavformat.
-*/
-
-mlt_producer producer_avformat_init( mlt_profile profile, char *file )
-{
- int error = 0;
-
- // Report information about available demuxers and codecs as YAML Tiny
- if ( file && strstr( file, "f-list" ) )
- {
- fprintf( stderr, "---\nformats:\n" );
- AVInputFormat *format = NULL;
- while ( ( format = av_iformat_next( format ) ) )
- fprintf( stderr, " - %s\n", format->name );
- fprintf( stderr, "...\n" );
- error = 1;
- }
- if ( file && strstr( file, "acodec-list" ) )
- {
- fprintf( stderr, "---\naudio_codecs:\n" );
- AVCodec *codec = NULL;
- while ( ( codec = av_codec_next( codec ) ) )
- if ( codec->decode && codec->type == CODEC_TYPE_AUDIO )
- fprintf( stderr, " - %s\n", codec->name );
- fprintf( stderr, "...\n" );
- error = 1;
- }
- if ( file && strstr( file, "vcodec-list" ) )
- {
- fprintf( stderr, "---\nvideo_codecs:\n" );
- AVCodec *codec = NULL;
- while ( ( codec = av_codec_next( codec ) ) )
- if ( codec->decode && codec->type == CODEC_TYPE_VIDEO )
- fprintf( stderr, " - %s\n", codec->name );
- fprintf( stderr, "...\n" );
- error = 1;
- }
- if ( error )
- return NULL;
-
- mlt_producer this = NULL;
-
- // Check that we have a non-NULL argument
- if ( file != NULL )
- {
- // Construct the producer
- this = calloc( 1, sizeof( struct mlt_producer_s ) );
-
- // Initialise it
- if ( mlt_producer_init( this, NULL ) == 0 )
- {
- // Get the properties
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Set the resource property (required for all producers)
- mlt_properties_set( properties, "resource", file );
-
- // Register our get_frame implementation
- this->get_frame = producer_get_frame;
-
- // Open the file
- if ( producer_open( this, profile, file ) != 0 )
- {
- // Clean up
- mlt_producer_close( this );
- this = NULL;
- }
- else
- {
- // Close the file to release resources for large playlists - reopen later as needed
- mlt_properties_set_data( properties, "dummy_context", NULL, 0, NULL, NULL );
- mlt_properties_set_data( properties, "audio_context", NULL, 0, NULL, NULL );
- mlt_properties_set_data( properties, "video_context", NULL, 0, NULL, NULL );
-
- // Default the user-selectable indices from the auto-detected indices
- mlt_properties_set_int( properties, "audio_index", mlt_properties_get_int( properties, "_audio_index" ) );
- mlt_properties_set_int( properties, "video_index", mlt_properties_get_int( properties, "_video_index" ) );
- }
- }
- }
-
- return this;
-}
-
-/** Find the default streams.
-*/
-
-static mlt_properties find_default_streams( mlt_properties meta_media, AVFormatContext *context, int *audio_index, int *video_index )
-{
- int i;
- char key[200];
-
- mlt_properties_set_int( meta_media, "meta.media.nb_streams", context->nb_streams );
-
- // Allow for multiple audio and video streams in the file and select first of each (if available)
- for( i = 0; i < context->nb_streams; i++ )
- {
- // Get the codec context
- AVStream *stream = context->streams[ i ];
- if ( ! stream ) continue;
- AVCodecContext *codec_context = stream->codec;
- if ( ! codec_context ) continue;
- AVCodec *codec = avcodec_find_decoder( codec_context->codec_id );
- if ( ! codec ) continue;
-
- snprintf( key, sizeof(key), "meta.media.%d.stream.type", i );
-
- // Determine the type and obtain the first index of each type
- switch( codec_context->codec_type )
- {
- case CODEC_TYPE_VIDEO:
- if ( *video_index < 0 )
- *video_index = i;
- mlt_properties_set( meta_media, key, "video" );
- snprintf( key, sizeof(key), "meta.media.%d.stream.frame_rate", i );
- mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->r_frame_rate ) );
-#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
- snprintf( key, sizeof(key), "meta.media.%d.stream.sample_aspect_ratio", i );
- mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->sample_aspect_ratio ) );
-#endif
- snprintf( key, sizeof(key), "meta.media.%d.codec.pix_fmt", i );
- mlt_properties_set( meta_media, key, avcodec_get_pix_fmt_name( codec_context->pix_fmt ) );
- snprintf( key, sizeof(key), "meta.media.%d.codec.sample_aspect_ratio", i );
- mlt_properties_set_double( meta_media, key, av_q2d( codec_context->sample_aspect_ratio ) );
- break;
- case CODEC_TYPE_AUDIO:
- if ( *audio_index < 0 )
- *audio_index = i;
- mlt_properties_set( meta_media, key, "audio" );
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
- snprintf( key, sizeof(key), "meta.media.%d.codec.sample_fmt", i );
- mlt_properties_set( meta_media, key, avcodec_get_sample_fmt_name( codec_context->sample_fmt ) );
-#endif
- snprintf( key, sizeof(key), "meta.media.%d.codec.sample_rate", i );
- mlt_properties_set_int( meta_media, key, codec_context->sample_rate );
- snprintf( key, sizeof(key), "meta.media.%d.codec.channels", i );
- mlt_properties_set_int( meta_media, key, codec_context->channels );
- break;
- default:
- break;
- }
-// snprintf( key, sizeof(key), "meta.media.%d.stream.time_base", i );
-// mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->time_base ) );
- snprintf( key, sizeof(key), "meta.media.%d.codec.name", i );
- mlt_properties_set( meta_media, key, codec->name );
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(55<<8)+0))
- snprintf( key, sizeof(key), "meta.media.%d.codec.long_name", i );
- mlt_properties_set( meta_media, key, codec->long_name );
-#endif
- snprintf( key, sizeof(key), "meta.media.%d.codec.bit_rate", i );
- mlt_properties_set_int( meta_media, key, codec_context->bit_rate );
-// snprintf( key, sizeof(key), "meta.media.%d.codec.time_base", i );
-// mlt_properties_set_double( meta_media, key, av_q2d( codec_context->time_base ) );
- snprintf( key, sizeof(key), "meta.media.%d.codec.profile", i );
- mlt_properties_set_int( meta_media, key, codec_context->profile );
- snprintf( key, sizeof(key), "meta.media.%d.codec.level", i );
- mlt_properties_set_int( meta_media, key, codec_context->level );
- }
-
- return meta_media;
-}
-
-/** Producer file destructor.
-*/
-
-static void producer_file_close( void *context )
-{
- if ( context != NULL )
- {
- // Lock the mutex now
- avformat_lock( );
-
- // Close the file
- av_close_input_file( context );
-
- // Unlock the mutex now
- avformat_unlock( );
- }
-}
-
-/** Producer file destructor.
-*/
-
-static void producer_codec_close( void *codec )
-{
- if ( codec != NULL )
- {
- // Lock the mutex now
- avformat_lock( );
-
- // Close the file
- avcodec_close( codec );
-
- // Unlock the mutex now
- avformat_unlock( );
- }
-}
-
-static inline int dv_is_pal( AVPacket *pkt )
-{
- return pkt->data[3] & 0x80;
-}
-
-static int dv_is_wide( AVPacket *pkt )
-{
- int i = 80 /* block size */ *3 /* VAUX starts at block 3 */ +3 /* skip block header */;
-
- for ( ; i < pkt->size; i += 5 /* packet size */ )
- {
- if ( pkt->data[ i ] == 0x61 )
- {
- uint8_t x = pkt->data[ i + 2 ] & 0x7;
- return ( x == 2 ) || ( x == 7 );
- }
- }
- return 0;
-}
-
-static double get_aspect_ratio( AVStream *stream, AVCodecContext *codec_context, AVPacket *pkt )
-{
- double aspect_ratio = 1.0;
-
- if ( codec_context->codec_id == CODEC_ID_DVVIDEO )
- {
- if ( pkt )
- {
- if ( dv_is_pal( pkt ) )
- {
- aspect_ratio = dv_is_wide( pkt )
- ? 64.0/45.0 // 16:9 PAL
- : 16.0/15.0; // 4:3 PAL
- }
- else
- {
- aspect_ratio = dv_is_wide( pkt )
- ? 32.0/27.0 // 16:9 NTSC
- : 8.0/9.0; // 4:3 NTSC
- }
- }
- else
- {
- AVRational ar =
-#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
- stream->sample_aspect_ratio;
-#else
- codec_context->sample_aspect_ratio;
-#endif
- // Override FFmpeg's notion of DV aspect ratios, which are
- // based upon a width of 704. Since we do not have a normaliser
- // that crops (nor is cropping 720 wide ITU-R 601 video always desirable)
- // we just coerce the values to facilitate a passive behaviour through
- // the rescale normaliser when using equivalent producers and consumers.
- // = display_aspect / (width * height)
- if ( ar.num == 10 && ar.den == 11 )
- aspect_ratio = 8.0/9.0; // 4:3 NTSC
- else if ( ar.num == 59 && ar.den == 54 )
- aspect_ratio = 16.0/15.0; // 4:3 PAL
- else if ( ar.num == 40 && ar.den == 33 )
- aspect_ratio = 32.0/27.0; // 16:9 NTSC
- else if ( ar.num == 118 && ar.den == 81 )
- aspect_ratio = 64.0/45.0; // 16:9 PAL
- }
- }
- else
- {
- AVRational codec_sar = codec_context->sample_aspect_ratio;
- AVRational stream_sar =
-#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
- stream->sample_aspect_ratio;
-#else
- { 0, 1 };
-#endif
- if ( codec_sar.num > 0 )
- aspect_ratio = av_q2d( codec_sar );
- else if ( stream_sar.num > 0 )
- aspect_ratio = av_q2d( stream_sar );
- }
- return aspect_ratio;
-}
-
-/** Open the file.
-*/
-
-static int producer_open( mlt_producer this, mlt_profile profile, char *file )
-{
- // Return an error code (0 == no error)
- int error = 0;
-
- // Context for avformat
- AVFormatContext *context = NULL;
-
- // Get the properties
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // We will treat everything with the producer fps
- double fps = mlt_profile_fps( profile );
-
- // Lock the mutex now
- avformat_lock( );
-
- // If "MRL", then create AVInputFormat
- AVInputFormat *format = NULL;
- AVFormatParameters *params = NULL;
- char *standard = NULL;
- char *mrl = strchr( file, ':' );
-
- // AV option (0 = both, 1 = video, 2 = audio)
- int av = 0;
-
- // Setting lowest log level
- av_log_set_level( -1 );
-
- // Only if there is not a protocol specification that avformat can handle
- if ( mrl && !url_exist( file ) )
- {
- // 'file' becomes format abbreviation
- mrl[0] = 0;
-
- // Lookup the format
- format = av_find_input_format( file );
-
- // Eat the format designator
- file = ++mrl;
-
- if ( format )
- {
- // Allocate params
- params = calloc( sizeof( AVFormatParameters ), 1 );
-
- // These are required by video4linux (defaults)
- params->width = 640;
- params->height = 480;
- params->time_base= (AVRational){1,25};
- // params->device = file;
- params->channels = 2;
- params->sample_rate = 48000;
- }
-
- // XXX: this does not work anymore since avdevice
- // TODO: make producer_avddevice?
- // Parse out params
- mrl = strchr( file, '?' );
- while ( mrl )
- {
- mrl[0] = 0;
- char *name = strdup( ++mrl );
- char *value = strchr( name, ':' );
- if ( value )
- {
- value[0] = 0;
- value++;
- char *t = strchr( value, '&' );
- if ( t )
- t[0] = 0;
- if ( !strcmp( name, "frame_rate" ) )
- params->time_base.den = atoi( value );
- else if ( !strcmp( name, "frame_rate_base" ) )
- params->time_base.num = atoi( value );
- else if ( !strcmp( name, "sample_rate" ) )
- params->sample_rate = atoi( value );
- else if ( !strcmp( name, "channels" ) )
- params->channels = atoi( value );
- else if ( !strcmp( name, "width" ) )
- params->width = atoi( value );
- else if ( !strcmp( name, "height" ) )
- params->height = atoi( value );
- else if ( !strcmp( name, "standard" ) )
- {
- standard = strdup( value );
- params->standard = standard;
- }
- else if ( !strcmp( name, "av" ) )
- av = atoi( value );
- }
- free( name );
- mrl = strchr( mrl, '&' );
- }
- }
-
- // Now attempt to open the file
- error = av_open_input_file( &context, file, format, 0, params ) < 0;
-
- // Cleanup AVFormatParameters
- free( standard );
- free( params );
-
- // If successful, then try to get additional info
- if ( error == 0 )
- {
- // Get the stream info
- error = av_find_stream_info( context ) < 0;
-
- // Continue if no error
- if ( error == 0 )
- {
- // We will default to the first audio and video streams found
- int audio_index = -1;
- int video_index = -1;
- int av_bypass = 0;
-
- // Now set properties where we can (use default unknowns if required)
- if ( context->duration != AV_NOPTS_VALUE )
- {
- // This isn't going to be accurate for all formats
- mlt_position frames = ( mlt_position )( ( ( double )context->duration / ( double )AV_TIME_BASE ) * fps + 0.5 );
- mlt_properties_set_position( properties, "out", frames - 1 );
- mlt_properties_set_position( properties, "length", frames );
- }
-
- // Find default audio and video streams
- find_default_streams( properties, context, &audio_index, &video_index );
-
- if ( context->start_time != AV_NOPTS_VALUE )
- mlt_properties_set_double( properties, "_start_time", context->start_time );
-
- // Check if we're seekable (something funny about mpeg here :-/)
- if ( strcmp( file, "pipe:" ) && strncmp( file, "http://", 6 ) && strncmp( file, "udp:", 4 ) && strncmp( file, "tcp:", 4 ) && strncmp( file, "rtsp:", 5 ) && strncmp( file, "rtp:", 4 ) )
- {
- mlt_properties_set_int( properties, "seekable", av_seek_frame( context, -1, mlt_properties_get_double( properties, "_start_time" ), AVSEEK_FLAG_BACKWARD ) >= 0 );
- mlt_properties_set_data( properties, "dummy_context", context, 0, producer_file_close, NULL );
- av_open_input_file( &context, file, NULL, 0, NULL );
- av_find_stream_info( context );
- }
- else
- av_bypass = 1;
-
- // Store selected audio and video indexes on properties
- mlt_properties_set_int( properties, "_audio_index", audio_index );
- mlt_properties_set_int( properties, "_video_index", video_index );
- mlt_properties_set_int( properties, "_last_position", -1 );
-
- // Fetch the width, height and aspect ratio
- if ( video_index != -1 )
- {
- AVCodecContext *codec_context = context->streams[ video_index ]->codec;
- mlt_properties_set_int( properties, "width", codec_context->width );
- mlt_properties_set_int( properties, "height", codec_context->height );
-
- if ( codec_context->codec_id == CODEC_ID_DVVIDEO )
- {
- // Fetch the first frame of DV so we can read it directly
- AVPacket pkt;
- int ret = 0;
- while ( ret >= 0 )
- {
- ret = av_read_frame( context, &pkt );
- if ( ret >= 0 && pkt.stream_index == video_index && pkt.size > 0 )
- {
- mlt_properties_set_double( properties, "aspect_ratio",
- get_aspect_ratio( context->streams[ video_index ], codec_context, &pkt ) );
- break;
- }
- }
- }
- else
- {
- mlt_properties_set_double( properties, "aspect_ratio",
- get_aspect_ratio( context->streams[ video_index ], codec_context, NULL ) );
- }
- }
-
- // Read Metadata
- if (context->title != NULL)
- mlt_properties_set(properties, "meta.attr.title.markup", context->title );
- if (context->author != NULL)
- mlt_properties_set(properties, "meta.attr.author.markup", context->author );
- if (context->copyright != NULL)
- mlt_properties_set(properties, "meta.attr.copyright.markup", context->copyright );
- if (context->comment != NULL)
- mlt_properties_set(properties, "meta.attr.comment.markup", context->comment );
- if (context->album != NULL)
- mlt_properties_set(properties, "meta.attr.album.markup", context->album );
- if (context->year != 0)
- mlt_properties_set_int(properties, "meta.attr.year.markup", context->year );
- if (context->track != 0)
- mlt_properties_set_int(properties, "meta.attr.track.markup", context->track );
-
- // We're going to cheat here - for a/v files, we will have two contexts (reasoning will be clear later)
- if ( av == 0 && audio_index != -1 && video_index != -1 )
- {
- // We'll use the open one as our video_context
- mlt_properties_set_data( properties, "video_context", context, 0, producer_file_close, NULL );
-
- // And open again for our audio context
- av_open_input_file( &context, file, NULL, 0, NULL );
- av_find_stream_info( context );
-
- // Audio context
- mlt_properties_set_data( properties, "audio_context", context, 0, producer_file_close, NULL );
- }
- else if ( av != 2 && video_index != -1 )
- {
- // We only have a video context
- mlt_properties_set_data( properties, "video_context", context, 0, producer_file_close, NULL );
- }
- else if ( audio_index != -1 )
- {
- // We only have an audio context
- mlt_properties_set_data( properties, "audio_context", context, 0, producer_file_close, NULL );
- }
- else
- {
- // Something has gone wrong
- error = -1;
- }
-
- mlt_properties_set_int( properties, "av_bypass", av_bypass );
- }
- }
-
- // Unlock the mutex now
- avformat_unlock( );
-
- return error;
-}
-
-/** Convert a frame position to a time code.
-*/
-
-static double producer_time_of_frame( mlt_producer this, mlt_position position )
-{
- return ( double )position / mlt_producer_get_fps( this );
-}
-
-static inline void convert_image( AVFrame *frame, uint8_t *buffer, int pix_fmt, mlt_image_format format, int width, int height )
-{
-#ifdef SWSCALE
- if ( format == mlt_image_yuv420p )
- {
- struct SwsContext *context = sws_getContext( width, height, pix_fmt,
- width, height, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
- AVPicture output;
- output.data[0] = buffer;
- output.data[1] = buffer + width * height;
- output.data[2] = buffer + ( 3 * width * height ) / 2;
- output.linesize[0] = width;
- output.linesize[1] = width >> 1;
- output.linesize[2] = width >> 1;
- sws_scale( context, frame->data, frame->linesize, 0, height,
- output.data, output.linesize);
- sws_freeContext( context );
- }
- else if ( format == mlt_image_rgb24 )
- {
- struct SwsContext *context = sws_getContext( width, height, pix_fmt,
- width, height, PIX_FMT_RGB24, SWS_FAST_BILINEAR, NULL, NULL, NULL);
- AVPicture output;
- avpicture_fill( &output, buffer, PIX_FMT_RGB24, width, height );
- sws_scale( context, frame->data, frame->linesize, 0, height,
- output.data, output.linesize);
- sws_freeContext( context );
- }
- else
- {
- struct SwsContext *context = sws_getContext( width, height, pix_fmt,
- width, height, PIX_FMT_YUYV422, SWS_FAST_BILINEAR, NULL, NULL, NULL);
- AVPicture output;
- avpicture_fill( &output, buffer, PIX_FMT_YUYV422, width, height );
- sws_scale( context, frame->data, frame->linesize, 0, height,
- output.data, output.linesize);
- sws_freeContext( context );
- }
-#else
- if ( format == mlt_image_yuv420p )
- {
- AVPicture pict;
- pict.data[0] = buffer;
- pict.data[1] = buffer + width * height;
- pict.data[2] = buffer + ( 3 * width * height ) / 2;
- pict.linesize[0] = width;
- pict.linesize[1] = width >> 1;
- pict.linesize[2] = width >> 1;
- img_convert( &pict, PIX_FMT_YUV420P, (AVPicture *)frame, pix_fmt, width, height );
- }
- else if ( format == mlt_image_rgb24 )
- {
- AVPicture output;
- avpicture_fill( &output, buffer, PIX_FMT_RGB24, width, height );
- img_convert( &output, PIX_FMT_RGB24, (AVPicture *)frame, pix_fmt, width, height );
- }
- else
- {
- AVPicture output;
- avpicture_fill( &output, buffer, PIX_FMT_YUYV422, width, height );
- img_convert( &output, PIX_FMT_YUYV422, (AVPicture *)frame, pix_fmt, width, height );
- }
-#endif
-}
-
-/** Allocate the image buffer and set it on the frame.
-*/
-
-static int allocate_buffer( mlt_properties frame_properties, AVCodecContext *codec_context, uint8_t **buffer, mlt_image_format *format, int *width, int *height )
-{
- int size = 0;
-
- if ( codec_context->width == 0 || codec_context->height == 0 )
- return size;
-
- *width = codec_context->width;
- *height = codec_context->height;
- mlt_properties_set_int( frame_properties, "width", *width );
- mlt_properties_set_int( frame_properties, "height", *height );
-
- switch ( *format )
- {
- case mlt_image_yuv420p:
- size = *width * 3 * ( *height + 1 ) / 2;
- break;
- case mlt_image_rgb24:
- size = *width * ( *height + 1 ) * 3;
- break;
- default:
- *format = mlt_image_yuv422;
- size = *width * ( *height + 1 ) * 2;
- break;
- }
-
- // Construct the output image
- *buffer = mlt_pool_alloc( size );
- if ( *buffer )
- mlt_properties_set_data( frame_properties, "image", *buffer, size, (mlt_destructor)mlt_pool_release, NULL );
- else
- size = 0;
-
- return size;
-}
-
-/** Get an image from a frame.
-*/
-
-static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
-{
- // Get the properties from the frame
- mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
-
- // Obtain the frame number of this frame
- mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" );
-
- // Get the producer
- mlt_producer this = mlt_properties_get_data( frame_properties, "avformat_producer", NULL );
-
- // Get the producer properties
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Fetch the video_context
- AVFormatContext *context = mlt_properties_get_data( properties, "video_context", NULL );
-
- // Get the video_index
- int index = mlt_properties_get_int( properties, "video_index" );
-
- // Obtain the expected frame numer
- mlt_position expected = mlt_properties_get_position( properties, "_video_expected" );
-
- // Get the video stream
- AVStream *stream = context->streams[ index ];
-
- // Get codec context
- AVCodecContext *codec_context = stream->codec;
-
- // Packet
- AVPacket pkt;
-
- // Get the conversion frame
- AVFrame *av_frame = mlt_properties_get_data( properties, "av_frame", NULL );
-
- // Special case pause handling flag
- int paused = 0;
-
- // Special case ffwd handling
- int ignore = 0;
-
- // We may want to use the source fps if available
- double source_fps = mlt_properties_get_double( properties, "source_fps" );
- double fps = mlt_producer_get_fps( this );
-
- // This is the physical frame position in the source
- int req_position = ( int )( position / fps * source_fps + 0.5 );
-
- // Get the seekable status
- int seekable = mlt_properties_get_int( properties, "seekable" );
-
- // Hopefully provide better support for streams...
- int av_bypass = mlt_properties_get_int( properties, "av_bypass" );
-
- // Determines if we have to decode all frames in a sequence
- int must_decode = 1;
-
- // Temporary hack to improve intra frame only
- must_decode = strcmp( codec_context->codec->name, "dnxhd" ) &&
- strcmp( codec_context->codec->name, "dvvideo" ) &&
- strcmp( codec_context->codec->name, "huffyuv" ) &&
- strcmp( codec_context->codec->name, "mjpeg" ) &&
- strcmp( codec_context->codec->name, "rawvideo" );
-
- // Seek if necessary
- if ( position != expected )
- {
- if ( av_frame != NULL && position + 1 == expected )
- {
- // We're paused - use last image
- paused = 1;
- }
- else if ( !seekable && position > expected && ( position - expected ) < 250 )
- {
- // Fast forward - seeking is inefficient for small distances - just ignore following frames
- ignore = ( int )( ( position - expected ) / fps * source_fps );
- }
- else if ( seekable && ( position < expected || position - expected >= 12 ) )
- {
- // Calculate the timestamp for the requested frame
- int64_t timestamp = ( int64_t )( ( double )req_position / source_fps * AV_TIME_BASE + 0.5 );
- if ( ( uint64_t )context->start_time != AV_NOPTS_VALUE )
- timestamp += context->start_time;
- if ( must_decode )
- timestamp -= AV_TIME_BASE;
- if ( timestamp < 0 )
- timestamp = 0;
-
- // Set to the timestamp
- av_seek_frame( context, -1, timestamp, AVSEEK_FLAG_BACKWARD );
-
- // Remove the cached info relating to the previous position
- mlt_properties_set_int( properties, "_current_position", -1 );
- mlt_properties_set_int( properties, "_last_position", -1 );
- mlt_properties_set_data( properties, "av_frame", NULL, 0, NULL, NULL );
- av_frame = NULL;
- }
- }
-
- // Duplicate the last image if necessary (see comment on rawvideo below)
- int current_position = mlt_properties_get_int( properties, "_current_position" );
- int got_picture = mlt_properties_get_int( properties, "_got_picture" );
- if ( av_frame != NULL && got_picture && ( paused || current_position >= req_position ) && av_bypass == 0 )
- {
- // Duplicate it
- if ( allocate_buffer( frame_properties, codec_context, buffer, format, width, height ) )
- convert_image( av_frame, *buffer, codec_context->pix_fmt, *format, *width, *height );
- else
- mlt_frame_get_image( frame, buffer, format, width, height, writable );
- }
- else
- {
- int ret = 0;
- int int_position = 0;
- got_picture = 0;
-
- av_init_packet( &pkt );
-
- // Construct an AVFrame for YUV422 conversion
- if ( av_frame == NULL )
- av_frame = avcodec_alloc_frame( );
-
- while( ret >= 0 && !got_picture )
- {
- // Read a packet
- ret = av_read_frame( context, &pkt );
-
- // We only deal with video from the selected video_index
- if ( ret >= 0 && pkt.stream_index == index && pkt.size > 0 )
- {
- // Determine time code of the packet
- int_position = ( int )( av_q2d( stream->time_base ) * pkt.dts * source_fps + 0.5 );
- if ( context->start_time != AV_NOPTS_VALUE )
- int_position -= ( int )( context->start_time * source_fps / AV_TIME_BASE + 0.5 );
- int last_position = mlt_properties_get_int( properties, "_last_position" );
- if ( int_position == last_position )
- int_position = last_position + 1;
- mlt_properties_set_int( properties, "_last_position", int_position );
-
- // Decode the image
- if ( must_decode || int_position >= req_position )
- ret = avcodec_decode_video( codec_context, av_frame, &got_picture, pkt.data, pkt.size );
-
- if ( got_picture )
- {
- // Handle ignore
- if ( int_position < req_position )
- {
- ignore = 0;
- got_picture = 0;
- }
- else if ( int_position >= req_position )
- {
- ignore = 0;
- }
- else if ( ignore -- )
- {
- got_picture = 0;
- }
- }
- av_free_packet( &pkt );
- }
- else if ( ret >= 0 )
- {
- av_free_packet( &pkt );
- }
-
- // Now handle the picture if we have one
- if ( got_picture )
- {
- if ( allocate_buffer( frame_properties, codec_context, buffer, format, width, height ) )
- {
- convert_image( av_frame, *buffer, codec_context->pix_fmt, *format, *width, *height );
- mlt_properties_set_int( frame_properties, "progressive", !av_frame->interlaced_frame );
- mlt_properties_set_int( properties, "top_field_first", av_frame->top_field_first );
- mlt_properties_set_int( properties, "_current_position", int_position );
- mlt_properties_set_int( properties, "_got_picture", 1 );
- mlt_properties_set_data( properties, "av_frame", av_frame, 0, av_free, NULL );
- }
- else
- {
- got_picture = 0;
- }
- }
- }
- if ( !got_picture )
- mlt_frame_get_image( frame, buffer, format, width, height, writable );
- }
-
- // Very untidy - for rawvideo, the packet contains the frame, hence the free packet
- // above will break the pause behaviour - so we wipe the frame now
- if ( !strcmp( codec_context->codec->name, "rawvideo" ) )
- mlt_properties_set_data( properties, "av_frame", NULL, 0, NULL, NULL );
-
- // Set the field order property for this frame
- mlt_properties_set_int( frame_properties, "top_field_first", mlt_properties_get_int( properties, "top_field_first" ) );
-
- // Regardless of speed, we expect to get the next frame (cos we ain't too bright)
- mlt_properties_set_position( properties, "_video_expected", position + 1 );
-
- return 0;
-}
-
-/** Process properties as AVOptions and apply to AV context obj
-*/
-
-static void apply_properties( void *obj, mlt_properties properties, int flags )
-{
- int i;
- int count = mlt_properties_count( properties );
- for ( i = 0; i < count; i++ )
- {
- const char *opt_name = mlt_properties_get_name( properties, i );
- const AVOption *opt = av_find_opt( obj, opt_name, NULL, flags, flags );
- if ( opt != NULL )
-#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(7<<8)+0)
- av_set_string3( obj, opt_name, mlt_properties_get( properties, opt_name), 0, NULL );
-#elif LIBAVCODEC_VERSION_INT >= ((51<<16)+(59<<8)+0)
- av_set_string2( obj, opt_name, mlt_properties_get( properties, opt_name), 0 );
-#else
- av_set_string( obj, opt_name, mlt_properties_get( properties, opt_name) );
-#endif
- }
-}
-
-/** Set up video handling.
-*/
-
-static void producer_set_up_video( mlt_producer this, mlt_frame frame )
-{
- // Get the properties
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Fetch the video_context
- AVFormatContext *context = mlt_properties_get_data( properties, "video_context", NULL );
-
- // Get the video_index
- int index = mlt_properties_get_int( properties, "video_index" );
-
- // Reopen the file if necessary
- if ( !context && index > -1 )
- {
- mlt_events_block( properties, this );
- producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(this) ),
- mlt_properties_get( properties, "resource" ) );
- context = mlt_properties_get_data( properties, "video_context", NULL );
- mlt_properties_set_data( properties, "dummy_context", NULL, 0, NULL, NULL );
- mlt_events_unblock( properties, this );
-
- // Process properties as AVOptions
- apply_properties( context, properties, AV_OPT_FLAG_DECODING_PARAM );
- }
-
- // Exception handling for video_index
- if ( context && index >= (int) context->nb_streams )
- {
- // Get the last video stream
- for ( index = context->nb_streams - 1; index >= 0 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_VIDEO; --index );
- mlt_properties_set_int( properties, "video_index", index );
- }
- if ( context && index > -1 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_VIDEO )
- {
- // Invalidate the video stream
- index = -1;
- mlt_properties_set_int( properties, "video_index", index );
- }
-
- // Get the frame properties
- mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
-
- if ( context && index > -1 )
- {
- // Get the video stream
- AVStream *stream = context->streams[ index ];
-
- // Get codec context
- AVCodecContext *codec_context = stream->codec;
-
- // Get the codec
- AVCodec *codec = mlt_properties_get_data( properties, "video_codec", NULL );
-
- // Update the video properties if the index changed
- if ( index != mlt_properties_get_int( properties, "_video_index" ) )
- {
- // Reset the video properties if the index changed
- mlt_properties_set_int( properties, "_video_index", index );
- mlt_properties_set_data( properties, "video_codec", NULL, 0, NULL, NULL );
- mlt_properties_set_int( properties, "width", codec_context->width );
- mlt_properties_set_int( properties, "height", codec_context->height );
- // TODO: get the first usable AVPacket and reset the stream position
- mlt_properties_set_double( properties, "aspect_ratio",
- get_aspect_ratio( context->streams[ index ], codec_context, NULL ) );
- codec = NULL;
- }
-
- // Initialise the codec if necessary
- if ( codec == NULL )
- {
- // Initialise multi-threading
- int thread_count = mlt_properties_get_int( properties, "threads" );
- if ( thread_count == 0 && getenv( "MLT_AVFORMAT_THREADS" ) )
- thread_count = atoi( getenv( "MLT_AVFORMAT_THREADS" ) );
- if ( thread_count > 1 )
- {
- avcodec_thread_init( codec_context, thread_count );
- codec_context->thread_count = thread_count;
- }
-
- // Find the codec
- codec = avcodec_find_decoder( codec_context->codec_id );
-
- // If we don't have a codec and we can't initialise it, we can't do much more...
- avformat_lock( );
- if ( codec != NULL && avcodec_open( codec_context, codec ) >= 0 )
- {
- // Now store the codec with its destructor
- mlt_properties_set_data( properties, "video_codec", codec_context, 0, producer_codec_close, NULL );
- }
- else
- {
- // Remember that we can't use this later
- mlt_properties_set_int( properties, "video_index", -1 );
- index = -1;
- }
- avformat_unlock( );
-
- // Process properties as AVOptions
- apply_properties( codec_context, properties, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM );
- }
-
- // No codec, no show...
- if ( codec && index > -1 )
- {
- double source_fps = 0;
- double force_aspect_ratio = mlt_properties_get_double( properties, "force_aspect_ratio" );
- double aspect_ratio = ( force_aspect_ratio > 0.0 ) ?
- force_aspect_ratio : mlt_properties_get_double( properties, "aspect_ratio" );
-
- // Determine the fps
- source_fps = ( double )codec_context->time_base.den / ( codec_context->time_base.num == 0 ? 1 : codec_context->time_base.num );
-
- // We'll use fps if it's available
- if ( source_fps > 0 )
- mlt_properties_set_double( properties, "source_fps", source_fps );
- else
- mlt_properties_set_double( properties, "source_fps", mlt_producer_get_fps( this ) );
- mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
-
- // Set the width and height
- mlt_properties_set_int( frame_properties, "width", codec_context->width );
- mlt_properties_set_int( frame_properties, "height", codec_context->height );
- mlt_properties_set_int( frame_properties, "real_width", codec_context->width );
- mlt_properties_set_int( frame_properties, "real_height", codec_context->height );
- mlt_properties_set_double( frame_properties, "aspect_ratio", aspect_ratio );
-
- mlt_frame_push_get_image( frame, producer_get_image );
- mlt_properties_set_data( frame_properties, "avformat_producer", this, 0, NULL, NULL );
- }
- else
- {
- mlt_properties_set_int( frame_properties, "test_image", 1 );
- }
- }
- else
- {
- mlt_properties_set_int( frame_properties, "test_image", 1 );
- }
-}
-
-/** Get the audio from a frame.
-*/
-
-static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
-{
- // Get the properties from the frame
- mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
-
- // Obtain the frame number of this frame
- mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" );
-
- // Get the producer
- mlt_producer this = mlt_properties_get_data( frame_properties, "avformat_producer", NULL );
-
- // Get the producer properties
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Fetch the audio_context
- AVFormatContext *context = mlt_properties_get_data( properties, "audio_context", NULL );
-
- // Get the audio_index
- int index = mlt_properties_get_int( properties, "audio_index" );
-
- // Get the seekable status
- int seekable = mlt_properties_get_int( properties, "seekable" );
-
- // Obtain the expected frame numer
- mlt_position expected = mlt_properties_get_position( properties, "_audio_expected" );
-
- // Obtain the resample context if it exists (not always needed)
- ReSampleContext *resample = mlt_properties_get_data( properties, "audio_resample", NULL );
-
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
- // Get the format converter context if it exists
- AVAudioConvert *convert = mlt_properties_get_data( properties, "audio_convert", NULL );
-#endif
-
- // Obtain the audio buffers
- int16_t *audio_buffer = mlt_properties_get_data( properties, "audio_buffer", NULL );
- int16_t *decode_buffer = mlt_properties_get_data( properties, "decode_buffer", NULL );
- int16_t *convert_buffer = mlt_properties_get_data( properties, "convert_buffer", NULL );
-
- // Get amount of audio used
- int audio_used = mlt_properties_get_int( properties, "_audio_used" );
-
- // Calculate the real time code
- double real_timecode = producer_time_of_frame( this, position );
-
- // Get the audio stream
- AVStream *stream = context->streams[ index ];
-
- // Get codec context
- AVCodecContext *codec_context = stream->codec;
-
- // Packet
- AVPacket pkt;
-
- // Number of frames to ignore (for ffwd)
- int ignore = 0;
-
- // Flag for paused (silence)
- int paused = 0;
-
- // Check for resample and create if necessary
- if ( resample == NULL && codec_context->channels <= 2 )
- {
- // Create the resampler
- resample = audio_resample_init( *channels, codec_context->channels, *frequency, codec_context->sample_rate );
-
- // And store it on properties
- mlt_properties_set_data( properties, "audio_resample", resample, 0, ( mlt_destructor )audio_resample_close, NULL );
- }
- else if ( resample == NULL )
- {
- *channels = codec_context->channels;
- *frequency = codec_context->sample_rate;
- }
-
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
- // Check for audio format converter and create if necessary
- // TODO: support higher resolutions than 16-bit.
- if ( convert == NULL && codec_context->sample_fmt != SAMPLE_FMT_S16 )
- {
- // Create single channel converter for interleaved with no mixing matrix
- convert = av_audio_convert_alloc( SAMPLE_FMT_S16, 1, codec_context->sample_fmt, 1, NULL, 0 );
- mlt_properties_set_data( properties, "audio_convert", convert, 0, ( mlt_destructor )av_audio_convert_free, NULL );
- }
-#endif
-
- // Check for audio buffer and create if necessary
- if ( audio_buffer == NULL )
- {
- // Allocate the audio buffer
- audio_buffer = mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * sizeof( int16_t ) );
-
- // And store it on properties for reuse
- mlt_properties_set_data( properties, "audio_buffer", audio_buffer, 0, ( mlt_destructor )mlt_pool_release, NULL );
- }
-
- // Check for decoder buffer and create if necessary
- if ( decode_buffer == NULL )
- {
- // Allocate the audio buffer
- decode_buffer = av_malloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * sizeof( int16_t ) );
-
- // And store it on properties for reuse
- mlt_properties_set_data( properties, "decode_buffer", decode_buffer, 0, ( mlt_destructor )av_free, NULL );
- }
-
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
- // Check for format converter buffer and create if necessary
- if ( resample && convert && convert_buffer == NULL )
- {
- // Allocate the audio buffer
- convert_buffer = mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * sizeof( int16_t ) );
-
- // And store it on properties for reuse
- mlt_properties_set_data( properties, "convert_buffer", convert_buffer, 0, ( mlt_destructor )mlt_pool_release, NULL );
- }
-#endif
-
- // Seek if necessary
- if ( position != expected )
- {
- if ( position + 1 == expected )
- {
- // We're paused - silence required
- paused = 1;
- }
- else if ( !seekable && position > expected && ( position - expected ) < 250 )
- {
- // Fast forward - seeking is inefficient for small distances - just ignore following frames
- ignore = position - expected;
- }
- else if ( position < expected || position - expected >= 12 )
- {
- int64_t timestamp = ( int64_t )( real_timecode * AV_TIME_BASE + 0.5 );
- if ( context->start_time != AV_NOPTS_VALUE )
- timestamp += context->start_time;
- if ( timestamp < 0 )
- timestamp = 0;
-
- // Set to the real timecode
- if ( av_seek_frame( context, -1, timestamp, AVSEEK_FLAG_BACKWARD ) != 0 )
- paused = 1;
-
- // Clear the usage in the audio buffer
- audio_used = 0;
- }
- }
-
- // Get the audio if required
- if ( !paused )
- {
- int ret = 0;
- int got_audio = 0;
-
- av_init_packet( &pkt );
-
- while( ret >= 0 && !got_audio )
- {
- // Check if the buffer already contains the samples required
- if ( audio_used >= *samples && ignore == 0 )
- {
- got_audio = 1;
- break;
- }
-
- // Read a packet
- ret = av_read_frame( context, &pkt );
-
- int len = pkt.size;
- uint8_t *ptr = pkt.data;
-
- // We only deal with audio from the selected audio_index
- while ( ptr != NULL && ret >= 0 && pkt.stream_index == index && len > 0 )
- {
- int data_size = sizeof( int16_t ) * AVCODEC_MAX_AUDIO_FRAME_SIZE;
-
- // Decode the audio
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(29<<8)+0))
- ret = avcodec_decode_audio2( codec_context, decode_buffer, &data_size, ptr, len );
-#else
- ret = avcodec_decode_audio( codec_context, decode_buffer, &data_size, ptr, len );
-#endif
- if ( ret < 0 )
- {
- ret = 0;
- break;
- }
-
- len -= ret;
- ptr += ret;
-
- if ( data_size > 0 )
- {
- int src_stride[6]= { av_get_bits_per_sample_format( codec_context->sample_fmt ) / 8 };
- int dst_stride[6]= { av_get_bits_per_sample_format( SAMPLE_FMT_S16 ) / 8 };
-
- if ( resample )
- {
- int16_t *source = decode_buffer;
- int16_t *dest = &audio_buffer[ audio_used * *channels ];
- int convert_samples = data_size / src_stride[0];
-
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
- if ( convert )
- {
- const void *src_buf[6] = { decode_buffer };
- void *dst_buf[6] = { convert_buffer };
- av_audio_convert( convert, dst_buf, dst_stride, src_buf, src_stride, convert_samples );
- source = convert_buffer;
- }
-#endif
- audio_used += audio_resample( resample, dest, source, convert_samples / codec_context->channels );
- }
- else
- {
-#if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
- if ( convert )
- {
- const void *src_buf[6] = { decode_buffer };
- void *dst_buf[6] = { &audio_buffer[ audio_used * *channels ] };
- av_audio_convert( convert, dst_buf, dst_stride, src_buf, src_stride, data_size / src_stride[0] );
- }
- else
-#endif
- {
- memcpy( &audio_buffer[ audio_used * *channels ], decode_buffer, data_size );
- }
- audio_used += data_size / *channels / src_stride[0];
- }
-
- // Handle ignore
- while ( ignore && audio_used > *samples )
- {
- ignore --;
- audio_used -= *samples;
- memmove( audio_buffer, &audio_buffer[ *samples * *channels ], audio_used * sizeof( int16_t ) );
- }
- }
-
- // If we're behind, ignore this packet
- if ( pkt.pts >= 0 )
- {
- double current_pts = av_q2d( stream->time_base ) * pkt.pts;
- double source_fps = mlt_properties_get_double( properties, "source_fps" );
- int req_position = ( int )( real_timecode * source_fps + 0.5 );
- int int_position = ( int )( current_pts * source_fps + 0.5 );
-
- if ( context->start_time != AV_NOPTS_VALUE )
- int_position -= ( int )( context->start_time * source_fps / AV_TIME_BASE + 0.5 );
- if ( seekable && !ignore && int_position < req_position )
- ignore = 1;
- }
- }
-
- // We're finished with this packet regardless
- av_free_packet( &pkt );
- }
-
- *buffer = mlt_pool_alloc( *samples * *channels * sizeof( int16_t ) );
- mlt_properties_set_data( frame_properties, "audio", *buffer, 0, ( mlt_destructor )mlt_pool_release, NULL );
-
- // Now handle the audio if we have enough
- if ( audio_used >= *samples )
- {
- memcpy( *buffer, audio_buffer, *samples * *channels * sizeof( int16_t ) );
- audio_used -= *samples;
- memmove( audio_buffer, &audio_buffer[ *samples * *channels ], audio_used * *channels * sizeof( int16_t ) );
- }
- else
- {
- memset( *buffer, 0, *samples * *channels * sizeof( int16_t ) );
- }
-
- // Store the number of audio samples still available
- mlt_properties_set_int( properties, "_audio_used", audio_used );
- }
- else
- {
- // Get silence and don't touch the context
- mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
- }
-
- // Regardless of speed (other than paused), we expect to get the next frame
- if ( !paused )
- mlt_properties_set_position( properties, "_audio_expected", position + 1 );
-
- return 0;
-}
-
-/** Set up audio handling.
-*/
-
-static void producer_set_up_audio( mlt_producer this, mlt_frame frame )
-{
- // Get the properties
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Fetch the audio_context
- AVFormatContext *context = mlt_properties_get_data( properties, "audio_context", NULL );
-
- // Get the audio_index
- int index = mlt_properties_get_int( properties, "audio_index" );
-
- // Reopen the file if necessary
- if ( !context && index > -1 )
- {
- mlt_events_block( properties, this );
- producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(this) ),
- mlt_properties_get( properties, "resource" ) );
- context = mlt_properties_get_data( properties, "audio_context", NULL );
- mlt_properties_set_data( properties, "dummy_context", NULL, 0, NULL, NULL );
- mlt_events_unblock( properties, this );
- }
-
- // Exception handling for audio_index
- if ( context && index >= (int) context->nb_streams )
- {
- for ( index = context->nb_streams - 1; index >= 0 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_AUDIO; --index );
- mlt_properties_set_int( properties, "audio_index", index );
- }
- if ( context && index > -1 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_AUDIO )
- {
- index = -1;
- mlt_properties_set_int( properties, "audio_index", index );
- }
-
- // Update the audio properties if the index changed
- if ( index > -1 && index != mlt_properties_get_int( properties, "_audio_index" ) )
- {
- mlt_properties_set_int( properties, "_audio_index", index );
- mlt_properties_set_data( properties, "audio_codec", NULL, 0, NULL, NULL );
- }
-
- // Deal with audio context
- if ( context != NULL && index > -1 )
- {
- // Get the frame properties
- mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
-
- // Get the audio stream
- AVStream *stream = context->streams[ index ];
-
- // Get codec context
- AVCodecContext *codec_context = stream->codec;
-
- // Get the codec
- AVCodec *codec = mlt_properties_get_data( properties, "audio_codec", NULL );
-
- // Initialise the codec if necessary
- if ( codec == NULL )
- {
- // Find the codec
- codec = avcodec_find_decoder( codec_context->codec_id );
-
- // If we don't have a codec and we can't initialise it, we can't do much more...
- avformat_lock( );
- if ( codec != NULL && avcodec_open( codec_context, codec ) >= 0 )
- {
- // Now store the codec with its destructor
- mlt_properties_set_data( properties, "audio_codec", codec_context, 0, producer_codec_close, NULL );
-
- }
- else
- {
- // Remember that we can't use this later
- mlt_properties_set_int( properties, "audio_index", -1 );
- index = -1;
- }
- avformat_unlock( );
-
- // Process properties as AVOptions
- apply_properties( codec_context, properties, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM );
- }
-
- // No codec, no show...
- if ( codec && index > -1 )
- {
- mlt_frame_push_audio( frame, producer_get_audio );
- mlt_properties_set_data( frame_properties, "avformat_producer", this, 0, NULL, NULL );
- mlt_properties_set_int( frame_properties, "frequency", codec_context->sample_rate );
- mlt_properties_set_int( frame_properties, "channels", codec_context->channels );
- }
- }
-}
-
-/** Our get frame implementation.
-*/
-
-static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index )
-{
- // Create an empty frame
- *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( this ) );
-
- // Update timecode on the frame we're creating
- mlt_frame_set_position( *frame, mlt_producer_position( this ) );
-
- // Set the position of this producer
- mlt_properties_set_position( MLT_FRAME_PROPERTIES( *frame ), "avformat_position", mlt_producer_frame( this ) );
-
- // Set up the video
- producer_set_up_video( this, *frame );
-
- // Set up the audio
- producer_set_up_audio( this, *frame );
-
- // Set the aspect_ratio
- mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame ), "aspect_ratio", mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "aspect_ratio" ) );
-
- // Calculate the next timecode
- mlt_producer_prepare_next( this );
-
- return 0;
-}
projects / melted / blobdiff