--- /dev/null
+/*
+ * consumer_avformat.c -- an encoder based on avformat
+ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
+ * Author: Charles Yates <charles.yates@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+// Local header files
+#include "consumer_avformat.h"
+
+// mlt Header files
+#include <framework/mlt_frame.h>
+
+// System header files
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+
+#include <math.h>
+
+// avformat header files
+#include <ffmpeg/avformat.h>
+
+typedef struct
+{
+ int16_t *buffer;
+ int size;
+ int used;
+}
+*sample_fifo, sample_fifo_s;
+
+sample_fifo sample_fifo_init( )
+{
+ return calloc( 1, sizeof( sample_fifo_s ) );
+}
+
+void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
+{
+ if ( ( this->size - this->used ) < count )
+ {
+ this->size += count * 5;
+ this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
+ }
+
+ memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
+ this->used += count;
+}
+
+int sample_fifo_used( sample_fifo this )
+{
+ return this->used;
+}
+
+int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
+{
+ if ( count > this->used )
+ count = this->used;
+
+ memcpy( samples, this->buffer, count * sizeof( int16_t ) );
+ this->used -= count;
+ memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
+
+ return count;
+}
+
+void sample_fifo_close( sample_fifo this )
+{
+ free( this->buffer );
+ free( this );
+}
+
+// Forward references.
+static int consumer_start( mlt_consumer this );
+static int consumer_stop( mlt_consumer this );
+static int consumer_is_stopped( mlt_consumer this );
+static void *consumer_thread( void *arg );
+static void consumer_close( mlt_consumer this );
+
+/** Initialise the dv consumer.
+*/
+
+mlt_consumer consumer_avformat_init( char *arg )
+{
+ // Allocate the consumer
+ mlt_consumer this = calloc( 1, sizeof( struct mlt_consumer_s ) );
+
+ // If memory allocated and initialises without error
+ if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
+ {
+ // Get properties from the consumer
+ mlt_properties properties = mlt_consumer_properties( this );
+
+ // Assign close callback
+ this->close = consumer_close;
+
+ // Interpret the argument
+ if ( arg != NULL )
+ mlt_properties_set( properties, "target", arg );
+
+ // sample and frame queue
+ mlt_properties_set_data( properties, "sample_fifo", sample_fifo_init( ), 0, ( mlt_destructor )sample_fifo_close, NULL );
+ mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
+
+ // Set avformat defaults
+ mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
+ mlt_properties_set_int( properties, "video_bit_rate", 400000 );
+ mlt_properties_set_int( properties, "gop_size", 12 );
+ mlt_properties_set_int( properties, "max_b_frames", 0 );
+ mlt_properties_set_int( properties, "mb_decision", 0 );
+
+ // Ensure termination at end of the stream
+ mlt_properties_set_int( properties, "terminate_on_pause", 1 );
+
+ // Set up start/stop/terminated callbacks
+ this->start = consumer_start;
+ this->stop = consumer_stop;
+ this->is_stopped = consumer_is_stopped;
+ }
+ else
+ {
+ // Clean up in case of init failure
+ free( this );
+ this = NULL;
+ }
+
+ // Return this
+ return this;
+}
+
+/** Start the consumer.
+*/
+
+static int consumer_start( mlt_consumer this )
+{
+ // Get the properties
+ mlt_properties properties = mlt_consumer_properties( this );
+
+ // Check that we're not already running
+ if ( !mlt_properties_get_int( properties, "running" ) )
+ {
+ // Allocate a thread
+ pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
+
+ // Get the width and height
+ int width = mlt_properties_get_int( properties, "width" );
+ int height = mlt_properties_get_int( properties, "height" );
+
+ // Obtain the size property
+ char *size = mlt_properties_get( properties, "size" );
+
+ // Interpret it
+ if ( size != NULL )
+ {
+ int tw, th;
+ if ( sscanf( size, "%dx%d", &tw, &th ) == 2 && tw > 0 && th > 0 )
+ {
+ width = tw;
+ height = th;
+ }
+ else
+ {
+ fprintf( stderr, "consumer_avformat: Invalid size property %s - ignoring.\n", size );
+ }
+ }
+
+ // Now ensure we honour the multiple of two requested by libavformat
+ mlt_properties_set_int( properties, "width", ( width / 2 ) * 2 );
+ mlt_properties_set_int( properties, "height", ( height / 2 ) * 2 );
+
+ // Assign the thread to properties
+ mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
+
+ // Set the running state
+ mlt_properties_set_int( properties, "running", 1 );
+
+ // Create the thread
+ pthread_create( thread, NULL, consumer_thread, this );
+ }
+ return 0;
+}
+
+/** Stop the consumer.
+*/
+
+static int consumer_stop( mlt_consumer this )
+{
+ // Get the properties
+ mlt_properties properties = mlt_consumer_properties( this );
+
+ // Check that we're running
+ if ( mlt_properties_get_int( properties, "running" ) )
+ {
+ // Get the thread
+ pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
+
+ // Stop the thread
+ mlt_properties_set_int( properties, "running", 0 );
+
+ // Wait for termination
+ pthread_join( *thread, NULL );
+ }
+
+ return 0;
+}
+
+/** Determine if the consumer is stopped.
+*/
+
+static int consumer_is_stopped( mlt_consumer this )
+{
+ // Get the properties
+ mlt_properties properties = mlt_consumer_properties( this );
+ return !mlt_properties_get_int( properties, "running" );
+}
+
+/** Add an audio output stream
+*/
+
+static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
+{
+ // Get the properties
+ mlt_properties properties = mlt_consumer_properties( this );
+
+ // Create a new stream
+ AVStream *st = av_new_stream( oc, 1 );
+
+ // If created, then initialise from properties
+ if ( st != NULL )
+ {
+ AVCodecContext *c = &st->codec;
+ c->codec_id = codec_id;
+ c->codec_type = CODEC_TYPE_AUDIO;
+
+ // Put sample parameters
+ c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
+ c->sample_rate = mlt_properties_get_int( properties, "frequency" );
+ c->channels = mlt_properties_get_int( properties, "channels" );
+ }
+ else
+ {
+ fprintf( stderr, "Could not allocate a stream for audio\n" );
+ }
+
+ return st;
+}
+
+static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
+{
+ // We will return the audio input size from here
+ int audio_input_frame_size = 0;
+
+ // Get the context
+ AVCodecContext *c = &st->codec;
+
+ // Find the encoder
+ AVCodec *codec = avcodec_find_encoder( c->codec_id );
+
+ // Continue if codec found and we can open it
+ if ( codec != NULL && avcodec_open(c, codec) >= 0 )
+ {
+ // ugly hack for PCM codecs (will be removed ASAP with new PCM
+ // support to compute the input frame size in samples
+ if ( c->frame_size <= 1 )
+ {
+ audio_input_frame_size = audio_outbuf_size / c->channels;
+ switch(st->codec.codec_id)
+ {
+ case CODEC_ID_PCM_S16LE:
+ case CODEC_ID_PCM_S16BE:
+ case CODEC_ID_PCM_U16LE:
+ case CODEC_ID_PCM_U16BE:
+ audio_input_frame_size >>= 1;
+ break;
+ default:
+ break;
+ }
+ }
+ else
+ {
+ audio_input_frame_size = c->frame_size;
+ }
+ }
+ else
+ {
+ fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
+ }
+
+ return audio_input_frame_size;
+}
+
+static void close_audio( AVFormatContext *oc, AVStream *st )
+{
+ avcodec_close( &st->codec );
+}
+
+/** Add a video output stream
+*/
+
+static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
+{
+ // Get the properties
+ mlt_properties properties = mlt_consumer_properties( this );
+
+ // Create a new stream
+ AVStream *st = av_new_stream( oc, 0 );
+
+ if ( st != NULL )
+ {
+ AVCodecContext *c = &st->codec;
+ c->codec_id = codec_id;
+ c->codec_type = CODEC_TYPE_VIDEO;
+
+ // put sample parameters
+ c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
+ c->width = mlt_properties_get_int( properties, "width" );
+ c->height = mlt_properties_get_int( properties, "height" );
+ c->frame_rate = mlt_properties_get_double( properties, "fps" );
+ c->frame_rate_base = 1;
+ c->gop_size = mlt_properties_get_int( properties, "gop_size" );
+ c->max_b_frames = mlt_properties_get_int( properties, "max_b_frames" );
+ c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
+
+ // Some formats want stream headers to be seperate (hmm)
+ if( !strcmp( oc->oformat->name, "mp4" ) ||
+ !strcmp( oc->oformat->name, "mov" ) ||
+ !strcmp( oc->oformat->name, "3gp" ) )
+ c->flags |= CODEC_FLAG_GLOBAL_HEADER;
+ }
+ else
+ {
+ fprintf( stderr, "Could not allocate a stream for video\n" );
+ }
+
+ return st;
+}
+
+static AVFrame *alloc_picture( int pix_fmt, int width, int height )
+{
+ // Allocate a frame
+ AVFrame *picture = avcodec_alloc_frame();
+
+ // Determine size of the
+ int size = avpicture_get_size(pix_fmt, width, height);
+
+ // Allocate the picture buf
+ uint8_t *picture_buf = av_malloc(size);
+
+ // If we have both, then fill the image
+ if ( picture != NULL && picture_buf != NULL )
+ {
+ // Fill the frame with the allocated buffer
+ avpicture_fill((AVPicture *)picture, picture_buf, pix_fmt, width, height);
+ }
+ else
+ {
+ // Something failed - clean up what we can
+ av_free(picture);
+ av_free(picture_buf);
+ picture = NULL;
+ }
+
+ return picture;
+}
+
+static int open_video(AVFormatContext *oc, AVStream *st)
+{
+ // Get the codec
+ AVCodecContext *c = &st->codec;
+
+ // find the video encoder
+ AVCodec *codec = avcodec_find_encoder(c->codec_id);
+
+ // Open the codec safely
+ return codec != NULL && avcodec_open(c, codec) >= 0;
+}
+
+void close_video(AVFormatContext *oc, AVStream *st)
+{
+ avcodec_close(&st->codec);
+}
+
+/** The main thread - the argument is simply the consumer.
+*/
+
+static void *consumer_thread( void *arg )
+{
+ // Map the argument to the object
+ mlt_consumer this = arg;
+
+ // Get the properties
+ mlt_properties properties = mlt_consumer_properties( this );
+
+ // Get the terminate on pause property
+ int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
+
+ // Get the frame rate
+ int fps = mlt_properties_get_double( properties, "fps" );
+
+ // Get width and height
+ int width = mlt_properties_get_int( properties, "width" );
+ int height = mlt_properties_get_int( properties, "height" );
+ int img_width = width;
+ int img_height = height;
+
+ // Get default audio properties
+ mlt_audio_format aud_fmt = mlt_audio_pcm;
+ int channels = mlt_properties_get_int( properties, "channels" );
+ int frequency = mlt_properties_get_int( properties, "frequency" );
+ int16_t *pcm = NULL;
+ int samples = 0;
+
+ // AVFormat audio buffer and frame size
+ int audio_outbuf_size = 10000;
+ uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
+ int audio_input_frame_size = 0;
+
+ // AVFormat video buffer and frame count
+ int frame_count = 0;
+ int video_outbuf_size = 200000;
+ uint8_t *video_outbuf = av_malloc(video_outbuf_size);
+
+ // Used for the frame properties
+ mlt_frame frame = NULL;
+ mlt_properties frame_properties = NULL;
+
+ // Get the queues
+ mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
+ sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
+
+ // Need two av pictures for converting
+ AVFrame *output = alloc_picture( PIX_FMT_YUV420P, width, height );
+ AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
+
+ // For receiving images from an mlt_frame
+ uint8_t *image;
+ mlt_image_format img_fmt = mlt_image_yuv422;
+
+ // Fo receiving audio samples back from the fifo
+ int16_t buffer[ 48000 * 2 ];
+ int count = 0;
+
+ // Allocate the context
+ AVFormatContext *oc = av_alloc_format_context();
+
+ // Streams
+ AVStream *audio_st = NULL;
+ AVStream *video_st = NULL;
+
+ // Time stamps
+ double audio_pts, video_pts;
+
+ // Loop variable
+ int i;
+
+ // Determine the format
+ AVOutputFormat *fmt = NULL;
+ char *filename = mlt_properties_get( properties, "target" );
+ char *format = mlt_properties_get( properties, "format" );
+ //char *vcodec = mlt_properties_get( properties, "vcodec" );
+ //char *acodec = mlt_properties_get( properties, "acodec" );
+
+ // Check for user selected format first
+ if ( format != NULL )
+ fmt = guess_format( format, NULL, NULL );
+
+ // Otherwise check on the filename
+ if ( fmt == NULL && filename != NULL )
+ fmt = guess_format( NULL, filename, NULL );
+
+ // Otherwise default to mpeg
+ if ( fmt == NULL )
+ fmt = guess_format( "mpeg", NULL, NULL );
+
+ // We need a filename - default to stdout?
+ if ( filename == NULL )
+ filename = "pipe:";
+
+ // Update the output context
+ oc->oformat = fmt;
+ snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
+
+ // Add audio and video streams
+ if ( fmt->video_codec != CODEC_ID_NONE )
+ video_st = add_video_stream( this, oc, fmt->video_codec );
+ if ( fmt->audio_codec != CODEC_ID_NONE )
+ audio_st = add_audio_stream( this, oc, fmt->audio_codec );
+
+ // Set the parameters (even though we have none...)
+ if ( av_set_parameters(oc, NULL) >= 0 )
+ {
+ if ( video_st && !open_video( oc, video_st ) )
+ video_st = NULL;
+ if ( audio_st )
+ audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
+
+ // Open the output file, if needed
+ if ( !( fmt->flags & AVFMT_NOFILE ) )
+ {
+ if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
+ {
+ fprintf(stderr, "Could not open '%s'\n", filename);
+ mlt_properties_set_int( properties, "running", 0 );
+ }
+ }
+
+ // Write the stream header, if any
+ if ( mlt_properties_get_int( properties, "running" ) )
+ av_write_header( oc );
+ }
+ else
+ {
+ fprintf(stderr, "Invalid output format parameters\n");
+ mlt_properties_set_int( properties, "running", 0 );
+ }
+
+ // Last check - need at least one stream
+ if ( audio_st == NULL && video_st == NULL )
+ mlt_properties_set_int( properties, "running", 0 );
+
+ // Loop while running
+ while( mlt_properties_get_int( properties, "running" ) )
+ {
+ // Get the frame
+ frame = mlt_consumer_rt_frame( this );
+
+ // Check that we have a frame to work with
+ if ( frame != NULL )
+ {
+ // Default audio args
+ frame_properties = mlt_frame_properties( frame );
+
+ // Get audio and append to the fifo
+ if ( audio_st )
+ {
+ samples = mlt_sample_calculator( fps, frequency, count );
+ mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
+ sample_fifo_append( fifo, pcm, samples * channels );
+ }
+
+ // Encode the image
+ if ( video_st )
+ mlt_deque_push_back( queue, frame );
+ else
+ mlt_frame_close( frame );
+
+ // While we have stuff to process, process...
+ while ( 1 )
+ {
+ // Compute current audio and video time
+ if (audio_st)
+ audio_pts = (double)audio_st->pts.val * oc->pts_num / oc->pts_den;
+ else
+ audio_pts = 0.0;
+
+ if (video_st)
+ video_pts = (double)video_st->pts.val * oc->pts_num / oc->pts_den;
+ else
+ video_pts = 0.0;
+
+ // Write interleaved audio and video frames
+ if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
+ {
+ if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
+ {
+ int out_size;
+ AVCodecContext *c;
+
+ c = &audio_st->codec;
+
+ sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
+
+ out_size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
+
+ // Write the compressed frame in the media file
+ if (av_write_frame(oc, audio_st->index, audio_outbuf, out_size) != 0)
+ fprintf(stderr, "Error while writing audio frame\n");
+ }
+ else
+ {
+ break;
+ }
+ }
+ else if ( video_st )
+ {
+ if ( mlt_deque_count( queue ) )
+ {
+ int out_size, ret;
+ AVCodecContext *c;
+
+ frame = mlt_deque_pop_front( queue );
+ frame_properties = mlt_frame_properties( frame );
+
+ if ( terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0 )
+ {
+ mlt_properties_set_int( properties, "running", 0 );
+ break;
+ }
+
+ c = &video_st->codec;
+
+ if ( mlt_properties_get_int( frame_properties, "rendered" ) )
+ {
+ int i = 0;
+ int j = 0;
+ uint8_t *p;
+ uint8_t *q;
+
+ mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
+
+ q = image;
+
+ for ( i = 0; i < height; i ++ )
+ {
+ p = input->data[ 0 ] + i * input->linesize[ 0 ];
+ j = width;
+ while( j -- )
+ {
+ *p ++ = *q ++;
+ *p ++ = *q ++;
+ }
+ }
+
+ img_convert( ( AVPicture * )output, PIX_FMT_YUV420P, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
+ }
+
+ if (oc->oformat->flags & AVFMT_RAWPICTURE)
+ {
+ // raw video case. The API will change slightly in the near future for that
+ ret = av_write_frame(oc, video_st->index, (uint8_t *)output, sizeof(AVPicture));
+ }
+ else
+ {
+ // Encode the image
+ out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
+
+ // If zero size, it means the image was buffered
+ if (out_size != 0)
+ {
+ // write the compressed frame in the media file
+ // XXX: in case of B frames, the pts is not yet valid
+ ret = av_write_frame( oc, video_st->index, video_outbuf, out_size );
+ }
+ }
+ frame_count++;
+ mlt_frame_close( frame );
+ }
+ else
+ {
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ // close each codec
+ if (video_st)
+ close_video(oc, video_st);
+ if (audio_st)
+ close_audio(oc, audio_st);
+
+ // Write the trailer, if any
+ av_write_trailer(oc);
+
+ // Free the streams
+ for(i = 0; i < oc->nb_streams; i++)
+ av_freep(&oc->streams[i]);
+
+ // Close the output file
+ if (!(fmt->flags & AVFMT_NOFILE))
+ url_fclose(&oc->pb);
+
+ // Clean up input and output frames
+ av_free( output->data[0] );
+ av_free( output );
+ av_free( input->data[0] );
+ av_free( input );
+ av_free( video_outbuf );
+
+ // Free the stream
+ av_free(oc);
+
+ return NULL;
+}
+
+/** Close the consumer.
+*/
+
+static void consumer_close( mlt_consumer this )
+{
+ // Stop the consumer
+ mlt_consumer_stop( this );
+
+ // Close the parent
+ mlt_consumer_close( this );
+
+ // Free the memory
+ free( this );
+}
+
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