mirror of https://git.videolan.org/git/ffmpeg.git
- Fix on AVI and WAV headers based on Nikolai Zhubr patch.
- Now the properties of the AVIs are correctly shown, but the MP2 audio isn't playable, it seems the problems is that Fraunhoffer MP3 decoder included on Windows cannot decode MP2 streams. Originally committed as revision 316 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Juanjo
parent
f5d1f41b11
commit
86bec9a161
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@ -31,7 +31,8 @@ typedef struct AVIIndex {
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} AVIIndex;
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typedef struct {
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offset_t movi_list;
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offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
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int audio_strm_length[MAX_STREAMS];
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AVIIndex *first, *last;
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} AVIContext;
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@ -109,11 +110,36 @@ void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc)
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put_le32(pb, 0);
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}
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void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
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{
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switch(stream->codec_id) {
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case CODEC_ID_PCM_S16LE:
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*au_scale = *au_ssize = 2*stream->channels;
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*au_byterate = *au_ssize * stream->sample_rate;
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break;
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_ALAW:
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case CODEC_ID_PCM_MULAW:
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*au_scale = *au_ssize = stream->channels;
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*au_byterate = *au_ssize * stream->sample_rate;
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break;
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case CODEC_ID_MP2:
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*au_ssize = 1;
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*au_scale = 1;
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*au_byterate = stream->bit_rate / 8;
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default:
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*au_ssize = 1;
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*au_scale = 1;
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*au_byterate = stream->bit_rate / 8;
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break;
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}
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}
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static int avi_write_header(AVFormatContext *s)
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{
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AVIContext *avi;
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ByteIOContext *pb = &s->pb;
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int bitrate, n, i, nb_frames;
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int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
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AVCodecContext *stream, *video_enc;
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offset_t list1, list2, strh, strf;
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@ -154,6 +180,7 @@ static int avi_write_header(AVFormatContext *s)
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put_le32(pb, bitrate / 8); /* XXX: not quite exact */
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put_le32(pb, 0); /* padding */
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put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
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avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
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put_le32(pb, nb_frames); /* nb frames, filled later */
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put_le32(pb, 0); /* initial frame */
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put_le32(pb, s->nb_streams); /* nb streams */
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@ -185,9 +212,10 @@ static int avi_write_header(AVFormatContext *s)
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put_le32(pb, 1000); /* scale */
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put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
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put_le32(pb, 0); /* start */
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avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
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put_le32(pb, nb_frames); /* length, XXX: fill later */
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put_le32(pb, 1024 * 1024); /* suggested buffer size */
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put_le32(pb, 10000); /* quality */
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put_le32(pb, -1); /* quality */
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put_le32(pb, stream->width * stream->height * 3); /* sample size */
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put_le16(pb, 0);
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put_le16(pb, 0);
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@ -196,18 +224,20 @@ static int avi_write_header(AVFormatContext *s)
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break;
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case CODEC_TYPE_AUDIO:
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put_tag(pb, "auds");
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put_le32(pb, 0);
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put_le32(pb, 1); /* tag */
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put_le32(pb, 0); /* flags */
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put_le16(pb, 0); /* priority */
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put_le16(pb, 0); /* language */
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put_le32(pb, 0); /* initial frame */
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put_le32(pb, 1); /* scale */
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put_le32(pb, stream->bit_rate / 8); /* rate */
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parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
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put_le32(pb, au_scale); /* scale */
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put_le32(pb, au_byterate); /* rate */
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put_le32(pb, 0); /* start */
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avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
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put_le32(pb, 0); /* length, XXX: filled later */
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put_le32(pb, 12 * 1024); /* suggested buffer size */
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put_le32(pb, -1); /* quality */
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put_le32(pb, 1); /* sample size */
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put_le32(pb, au_ssize); /* sample size */
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put_le32(pb, 0);
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put_le32(pb, 0);
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break;
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@ -265,6 +295,8 @@ static int avi_write_packet(AVFormatContext *s, int stream_index,
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tag[3] = 'b';
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flags = 0x10;
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}
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if (enc->codec_type == CODEC_TYPE_AUDIO)
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avi->audio_strm_length[stream_index] += size;
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if (!url_is_streamed(&s->pb)) {
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idx = malloc(sizeof(AVIIndex));
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@ -295,6 +327,8 @@ static int avi_write_trailer(AVFormatContext *s)
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ByteIOContext *pb = &s->pb;
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AVIContext *avi = s->priv_data;
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offset_t file_size, idx_chunk;
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int n, nb_frames, au_byterate, au_ssize, au_scale;
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AVCodecContext *stream;
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AVIIndex *idx;
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if (!url_is_streamed(&s->pb)) {
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@ -315,6 +349,32 @@ static int avi_write_trailer(AVFormatContext *s)
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file_size = url_ftell(pb);
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url_fseek(pb, 4, SEEK_SET);
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put_le32(pb, (UINT32)(file_size - 8));
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/* Fill in frame/sample counters */
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nb_frames = 0;
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for(n=0;n<s->nb_streams;n++) {
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if (avi->frames_hdr_strm[n] != 0) {
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stream = &s->streams[n]->codec;
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url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
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if (stream->codec_type == CODEC_TYPE_VIDEO) {
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put_le32(pb, stream->frame_number);
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if (nb_frames < stream->frame_number)
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nb_frames = stream->frame_number;
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} else {
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if (stream->codec_id == CODEC_ID_MP2) {
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put_le32(pb, stream->frame_number);
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nb_frames += stream->frame_number;
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} else {
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parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
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put_le32(pb, avi->audio_strm_length[n] / au_ssize);
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}
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}
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}
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}
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if (avi->frames_hdr_all != 0) {
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url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
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put_le32(pb, nb_frames);
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}
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url_fseek(pb, file_size, SEEK_SET);
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}
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put_flush_packet(pb);
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31
libav/wav.c
31
libav/wav.c
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@ -33,7 +33,7 @@ CodecTag codec_wav_tags[] = {
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/* WAVEFORMATEX header */
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int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
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{
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int tag, bps;
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int tag, bps, blkalign, bytespersec;
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tag = codec_get_tag(codec_wav_tags, enc->codec_id);
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if (tag == 0)
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@ -41,18 +41,39 @@ int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
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put_le16(pb, tag);
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put_le16(pb, enc->channels);
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put_le32(pb, enc->sample_rate);
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put_le32(pb, enc->bit_rate / 8);
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put_le16(pb, 1); /* block align */
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if (enc->codec_id == CODEC_ID_PCM_U8 ||
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enc->codec_id == CODEC_ID_PCM_ALAW ||
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enc->codec_id == CODEC_ID_PCM_MULAW) {
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bps = 8;
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} else if (enc->codec_id == CODEC_ID_MP2) {
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bps = 0;
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} else {
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bps = 16;
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}
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put_le16(pb, bps); /* bits per sample */
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put_le16(pb, 0); /* wav_extra_size */
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if (enc->codec_id == CODEC_ID_MP2)
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blkalign = 1;
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else
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blkalign = enc->channels*bps >> 3;
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if (enc->codec_id == CODEC_ID_PCM_U8 ||
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enc->codec_id == CODEC_ID_PCM_S16LE) {
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bytespersec = enc->sample_rate * blkalign;
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} else {
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bytespersec = enc->bit_rate / 8;
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}
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put_le32(pb, bytespersec); /* bytes per second */
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put_le16(pb, blkalign); /* block align */
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put_le16(pb, bps); /* bits per sample */
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if (enc->codec_id == CODEC_ID_MP2) {
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put_le16(pb, 12); /* wav_extra_size */
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put_le16(pb, 1); /* wID */
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put_le32(pb, 2); /* fdwFlags */
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put_le16(pb, 1152); /* nBlockSize */
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put_le16(pb, 1); /* nFramesPerBlock */
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put_le16(pb, 1393); /* nCodecDelay */
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} else
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put_le16(pb, 0); /* wav_extra_size */
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return 0;
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}
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