mirror of
https://github.com/mpv-player/mpv
synced 2025-01-16 22:37:28 +01:00
completely reworked FILM demuxer to support both audio and video...neither
of which work yet (CVID video and uncompressed audio)...but the demuxer is working well now git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4565 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
melanson
parent
37892b0819
commit
c3c9527d3e
@ -20,16 +20,30 @@
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#define CHUNK_FDSC mmioFOURCC('F', 'D', 'S', 'C')
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#define CHUNK_STAB mmioFOURCC('S', 'T', 'A', 'B')
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typedef struct _film_frames_t {
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int num_frames;
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int current_frame;
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off_t *filepos;
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unsigned int *frame_size;
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unsigned int *flags1;
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unsigned int *flags2;
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} film_frames_t;
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typedef struct _film_chunk_t
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{
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off_t chunk_offset;
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int chunk_size;
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void demux_seek_film(demuxer_t *demuxer,float rel_seek_secs,int flags){
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unsigned int flags1;
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unsigned int flags2;
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unsigned int video_chunk_number; // in the case of a video chunk
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unsigned int running_audio_sample_count; // for an audio chunk
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} film_chunk_t;
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typedef struct _film_data_t
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{
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int total_chunks;
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int current_chunk;
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int total_video_chunks;
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int total_audio_sample_count;
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film_chunk_t *chunks;
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} film_data_t;
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#if 0
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void demux_seek_film(demuxer_t *demuxer,float rel_seek_secs,int flags)
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{
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film_frames_t *frames = (film_frames_t *)demuxer->priv;
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sh_video_t *sh_video = demuxer->video->sh;
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int newpos=(flags&1)?0:frames->current_frame;
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@ -44,48 +58,58 @@ void demux_seek_film(demuxer_t *demuxer,float rel_seek_secs,int flags){
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if(newpos>frames->num_frames) newpos=frames->num_frames;
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frames->current_frame=newpos;
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}
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#endif
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// return value:
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// 0 = EOF or no stream found
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// 1 = successfully read a packet
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int demux_film_fill_buffer(demuxer_t *demuxer){
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film_frames_t *frames = (film_frames_t *)demuxer->priv;
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int demux_film_fill_buffer(demuxer_t *demuxer)
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{
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sh_video_t *sh_video = demuxer->video->sh;
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film_data_t *film_data = (film_data_t *)demuxer->priv;
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film_chunk_t film_chunk;
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// see if the end has been reached
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if (frames->current_frame >= frames->num_frames)
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if (film_data->current_chunk >= film_data->total_chunks)
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return 0;
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// fetch the frame from the file
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// first, position the file properly since ds_read_packet() doesn't
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// seem to do it, even though it takes a file offset as a parameter
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stream_seek(demuxer->stream, frames->filepos[frames->current_frame]);
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ds_read_packet(demuxer->video,
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demuxer->stream,
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frames->frame_size[frames->current_frame],
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frames->current_frame/sh_video->fps,
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frames->filepos[frames->current_frame],
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0 /* what flags? -> demuxer.h (alex) */
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);
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film_chunk = film_data->chunks[film_data->current_chunk];
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// get the next frame ready
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frames->current_frame++;
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// position stream and fetch chunk
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stream_seek(demuxer->stream, film_chunk.chunk_offset);
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if (film_chunk.flags1 == 0xFFFFFFFF)
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ds_read_packet(demuxer->audio, demuxer->stream, film_chunk.chunk_size,
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0, /* pts */
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film_chunk.chunk_offset, 0);
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else
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ds_read_packet(demuxer->video, demuxer->stream, film_chunk.chunk_size,
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film_chunk.video_chunk_number / sh_video->fps,
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film_chunk.chunk_offset, 0);
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film_data->current_chunk++;
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return 1;
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}
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demuxer_t* demux_open_film(demuxer_t* demuxer){
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demuxer_t* demux_open_film(demuxer_t* demuxer)
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{
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sh_video_t *sh_video = NULL;
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film_frames_t *frames = (film_frames_t *)malloc(sizeof(film_frames_t));
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sh_audio_t *sh_audio = NULL;
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film_data_t *film_data;
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film_chunk_t film_chunk;
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int header_size;
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unsigned int chunk_type;
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unsigned int chunk_size;
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int i;
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int frame_number;
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unsigned int video_format;
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int largest_audio_chunk = 0;
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int audio_channels;
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int audio_bits;
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int audio_frequency;
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film_data = (film_data_t *)malloc(sizeof(film_data_t));
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film_data->total_chunks = 0;
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film_data->current_chunk = 0;
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film_data->total_video_chunks = 0;
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film_data->chunks = NULL;
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// go back to the beginning
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stream_reset(demuxer->stream);
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@ -110,17 +134,6 @@ demuxer_t* demux_open_film(demuxer_t* demuxer){
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// skip to where the next chunk should be
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stream_skip(demuxer->stream, 8);
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// create a new video stream header
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sh_video = new_sh_video(demuxer, 0);
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// make sure the demuxer knows about the new video stream header
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demuxer->video->sh = sh_video;
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// make sure that the video demuxer stream header knows about its
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// parent video demuxer stream, or else
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// video_read_properties() will choke
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sh_video->ds = demuxer->video;
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// traverse through the header
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while (header_size > 0)
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{
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@ -132,57 +145,98 @@ demuxer_t* demux_open_film(demuxer_t* demuxer){
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switch (chunk_type)
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{
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case CHUNK_FDSC:
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printf ("parsing FDSC chunk\n");
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// fetch the video codec fourcc, height, then width
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sh_video->format = stream_read_fourcc(demuxer->stream);
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sh_video->disp_h = stream_read_dword(demuxer->stream);
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sh_video->disp_w = stream_read_dword(demuxer->stream);
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sh_video->fps = stream_read_char(demuxer->stream);
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sh_video->frametime = 1/sh_video->fps;
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printf (" FILM video: %d x %d, %f fps\n", sh_video->disp_w,
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sh_video->disp_h, sh_video->fps);
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mp_msg(MSGT_DECVIDEO, MSGL_V, "parsing FDSC chunk\n");
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// fetch the video codec fourcc to see if there's any video
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video_format = stream_read_fourcc(demuxer->stream);
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if (video_format)
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{
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// create and initialize the video stream header
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sh_video = new_sh_video(demuxer, 0);
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demuxer->video->sh = sh_video;
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sh_video->ds = demuxer->video;
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// temporary: These will eventually go directly into an audio structure
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// of some sort
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sh_video->format = video_format;
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sh_video->disp_h = stream_read_dword(demuxer->stream);
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sh_video->disp_w = stream_read_dword(demuxer->stream);
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sh_video->fps = stream_read_char(demuxer->stream);
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sh_video->frametime = 1/sh_video->fps;
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mp_msg(MSGT_DECVIDEO, MSGL_V,
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" FILM video: %d x %d, %f fps\n", sh_video->disp_w,
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sh_video->disp_h, sh_video->fps);
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}
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else
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stream_skip(demuxer->stream, 9);
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// fetch the audio channels to see if there's any audio
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audio_channels = stream_read_char(demuxer->stream);
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audio_bits = stream_read_char(demuxer->stream);
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stream_skip(demuxer->stream, 1); // skip unknown byte
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audio_frequency = stream_read_word(demuxer->stream);
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printf (" FILM audio: %d channels, %d bits, %d Hz\n",
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audio_channels, audio_bits, audio_frequency);
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if (audio_channels > 0)
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{
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// create and initialize the audio stream header
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sh_audio = new_sh_audio(demuxer, 0);
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demuxer->audio->sh = sh_audio;
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sh_audio->ds = demuxer->audio;
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stream_skip(demuxer->stream, 6);
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// go through the bother of making a WAVEFORMATEX structure
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sh_audio->wf = (WAVEFORMATEX *)malloc(sizeof(WAVEFORMATEX));
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// uncompressed PCM format
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sh_audio->wf->wFormatTag = 1;
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sh_audio->format = 1;
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sh_audio->wf->nChannels = audio_channels;
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sh_audio->wf->wBitsPerSample = stream_read_char(demuxer->stream);
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stream_skip(demuxer->stream, 1); // skip unknown byte
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sh_audio->wf->nSamplesPerSec = stream_read_word(demuxer->stream);
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sh_audio->wf->nAvgBytesPerSec =
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sh_audio->wf->nSamplesPerSec * sh_audio->wf->wBitsPerSample / 8;
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stream_skip(demuxer->stream, 6); // skip the rest of the unknown
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mp_msg(MSGT_DECVIDEO, MSGL_V,
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" FILM audio: %d channels, %d bits, %d Hz\n",
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sh_audio->wf->nChannels, 8 * sh_audio->wf->wBitsPerSample,
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sh_audio->wf->nSamplesPerSec);
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}
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else
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stream_skip(demuxer->stream, 10);
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break;
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case CHUNK_STAB:
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printf ("parsing STAB chunk\n");
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mp_msg(MSGT_DECVIDEO, MSGL_V, "parsing STAB chunk\n");
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// skip unknown dword
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stream_skip(demuxer->stream, 4);
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// fetch the number of frames
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frames->num_frames = stream_read_dword(demuxer->stream);
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frames->current_frame = 0;
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// fetch the number of chunks
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film_data->total_chunks = stream_read_dword(demuxer->stream);
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film_data->current_chunk = 0;
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mp_msg(MSGT_DECVIDEO, MSGL_V,
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" STAB chunk contains %d chunks\n", film_data->total_chunks);
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// allocate enough entries for the indices
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frames->filepos = (off_t *)malloc(frames->num_frames * sizeof(off_t));
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frames->frame_size = (int *)malloc(frames->num_frames * sizeof(int));
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frames->flags1 = (int *)malloc(frames->num_frames * sizeof(int));
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frames->flags2 = (int *)malloc(frames->num_frames * sizeof(int));
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// allocate enough entries for the chunk
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film_data->chunks =
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(film_chunk_t *)malloc(film_data->total_chunks * sizeof(film_chunk_t));
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// build the frame index
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frame_number = 0;
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for (i = 0; i < frames->num_frames; i++)
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// build the chunk index
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for (i = 0; i < film_data->total_chunks; i++)
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{
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if (frames->flags1[i] == 0)
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{
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frames->filepos[frame_number] = demuxer->movi_start + stream_read_dword(demuxer->stream);
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frames->frame_size[frame_number] = stream_read_dword(demuxer->stream) - 8;
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frames->flags1[frame_number] = stream_read_dword(demuxer->stream);
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frames->flags2[frame_number] = stream_read_dword(demuxer->stream);
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frame_number++;
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}
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film_chunk = film_data->chunks[i];
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film_chunk.chunk_offset =
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demuxer->movi_start + stream_read_dword(demuxer->stream);
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film_chunk.chunk_size = stream_read_dword(demuxer->stream) - 8;
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film_chunk.flags1 = stream_read_dword(demuxer->stream);
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film_chunk.flags2 = stream_read_dword(demuxer->stream);
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film_data->chunks[i] = film_chunk;
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// audio housekeeping
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if ((film_chunk.flags1 == 0xFFFFFFFF) &&
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(film_chunk.chunk_size > largest_audio_chunk))
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largest_audio_chunk = film_chunk.chunk_size;
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film_data->total_audio_sample_count +=
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(chunk_size / sh_audio->wf->nChannels);
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// video housekeeping
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if (film_chunk.flags1 != 0xFFFFFFFF)
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film_chunk.video_chunk_number =
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film_data->total_video_chunks++;
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}
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frames->num_frames = frame_number;
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break;
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default:
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@ -193,11 +247,7 @@ printf ("parsing STAB chunk\n");
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}
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}
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// hard code the speed for now
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sh_video->fps = 1;
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sh_video->frametime = 1;
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demuxer->priv = frames;
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demuxer->priv = film_data;
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return demuxer;
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}
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