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author | Mike Melanson <mike@multimedia.cx> | 2003-05-28 02:41:24 +0000 |
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committer | Mike Melanson <mike@multimedia.cx> | 2003-05-28 02:41:24 +0000 |
commit | 8e7284ba915389212f55a2310b0767f2fb40aed7 (patch) | |
tree | 665c20939c45ca3a55c88e78140508b9482fabb5 | |
parent | e2a7bb282d162b88cbc26deeaa4e50d88ba3f59f (diff) | |
download | ffmpeg-streaming-8e7284ba915389212f55a2310b0767f2fb40aed7.zip ffmpeg-streaming-8e7284ba915389212f55a2310b0767f2fb40aed7.tar.gz |
dispatch video as well as audio
Originally committed as revision 1914 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r-- | libavformat/4xm.c | 161 |
1 files changed, 110 insertions, 51 deletions
diff --git a/libavformat/4xm.c b/libavformat/4xm.c index b45fd05..706bd52 100644 --- a/libavformat/4xm.c +++ b/libavformat/4xm.c @@ -32,17 +32,12 @@ (((uint8_t*)(x))[2] << 16) | \ (((uint8_t*)(x))[1] << 8) | \ ((uint8_t*)(x))[0]) -#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1]) -#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \ - (((uint8_t*)(x))[1] << 16) | \ - (((uint8_t*)(x))[2] << 8) | \ - ((uint8_t*)(x))[3]) #define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \ - ( (long)(unsigned char)(ch3) | \ - ( (long)(unsigned char)(ch2) << 8 ) | \ - ( (long)(unsigned char)(ch1) << 16 ) | \ - ( (long)(unsigned char)(ch0) << 24 ) ) + ( (long)(unsigned char)(ch0) | \ + ( (long)(unsigned char)(ch1) << 8 ) | \ + ( (long)(unsigned char)(ch2) << 16 ) | \ + ( (long)(unsigned char)(ch3) << 24 ) ) #define RIFF_TAG FOURCC_TAG('R', 'I', 'F', 'F') #define _4XMV_TAG FOURCC_TAG('4', 'X', 'M', 'V') @@ -65,39 +60,43 @@ #define strk_SIZE 0x28 #define GET_LIST_HEADER() \ - fourcc_tag = get_be32(pb); \ + fourcc_tag = get_le32(pb); \ size = get_le32(pb); \ if (fourcc_tag != LIST_TAG) \ return AVERROR_INVALIDDATA; \ - fourcc_tag = get_be32(pb); + fourcc_tag = get_le32(pb); typedef struct AudioTrack { int sample_rate; int bits; int channels; + int stream_index; } AudioTrack; typedef struct FourxmDemuxContext { int width; int height; + int video_stream_index; int track_count; AudioTrack *tracks; int selected_track; + + int64_t pts; + int last_chunk_was_audio; + int last_audio_frame_count; } FourxmDemuxContext; static int fourxm_probe(AVProbeData *p) { - if ((BE_32(&p->buf[0]) != RIFF_TAG) || - (BE_32(&p->buf[8]) != _4XMV_TAG)) + if ((LE_32(&p->buf[0]) != RIFF_TAG) || + (LE_32(&p->buf[8]) != _4XMV_TAG)) return 0; -printf (" detected .4xm file\n"); - return AVPROBE_SCORE_MAX; } static int fourxm_read_header(AVFormatContext *s, - AVFormatParameters *ap) + AVFormatParameters *ap) { ByteIOContext *pb = &s->pb; unsigned int fourcc_tag; @@ -131,7 +130,7 @@ static int fourxm_read_header(AVFormatContext *s, /* take the lazy approach and search for any and all vtrk and strk chunks */ for (i = 0; i < header_size - 8; i++) { - fourcc_tag = BE_32(&header[i]); + fourcc_tag = LE_32(&header[i]); size = LE_32(&header[i + 4]); if (fourcc_tag == vtrk_TAG) { @@ -143,6 +142,20 @@ static int fourxm_read_header(AVFormatContext *s, fourxm->width = LE_32(&header[i + 36]); fourxm->height = LE_32(&header[i + 40]); i += 8 + size; + + /* allocate a new AVStream */ + st = av_new_stream(s, 0); + if (!st) + return AVERROR_NOMEM; + + fourxm->video_stream_index = st->index; + + st->codec.codec_type = CODEC_TYPE_VIDEO; + st->codec.codec_id = CODEC_ID_4XM; + st->codec.codec_tag = 0; /* no fourcc */ + st->codec.width = fourxm->width; + st->codec.height = fourxm->height; + } else if (fourcc_tag == strk_TAG) { /* check that there is enough data */ if (size != strk_SIZE) { @@ -163,6 +176,26 @@ static int fourxm_read_header(AVFormatContext *s, fourxm->tracks[current_track].sample_rate = LE_32(&header[i + 40]); fourxm->tracks[current_track].bits = LE_32(&header[i + 44]); i += 8 + size; + + /* allocate a new AVStream */ + st = av_new_stream(s, current_track); + if (!st) + return AVERROR_NOMEM; + + fourxm->tracks[current_track].stream_index = st->index; + + st->codec.codec_type = CODEC_TYPE_AUDIO; + st->codec.codec_tag = 1; + st->codec.channels = fourxm->tracks[current_track].channels; + st->codec.sample_rate = fourxm->tracks[current_track].sample_rate; + st->codec.bits_per_sample = fourxm->tracks[current_track].bits; + st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * + st->codec.bits_per_sample; + st->codec.block_align = st->codec.channels * st->codec.bits_per_sample; + if (st->codec.bits_per_sample == 8) + st->codec.codec_id = CODEC_ID_PCM_U8; + else + st->codec.codec_id = CODEC_ID_PCM_S16LE; } } @@ -173,30 +206,20 @@ static int fourxm_read_header(AVFormatContext *s, if (fourcc_tag != MOVI_TAG) return AVERROR_INVALIDDATA; - if (current_track > -1) { - st = av_new_stream(s, 0); - if (!st) - return AVERROR_NOMEM; - - st->codec.codec_type = CODEC_TYPE_AUDIO; - st->codec.codec_tag = 1; - st->codec.channels = fourxm->tracks[current_track].channels; - st->codec.sample_rate = fourxm->tracks[current_track].sample_rate; - st->codec.bits_per_sample = fourxm->tracks[current_track].bits; - st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * - st->codec.bits_per_sample; - st->codec.block_align = st->codec.channels * st->codec.bits_per_sample; - if (st->codec.bits_per_sample == 8) - st->codec.codec_id = CODEC_ID_PCM_U8; - else - st->codec.codec_id = CODEC_ID_PCM_S16LE; - } + /* initialize context members */ + fourxm->pts = 0; + fourxm->last_chunk_was_audio = 0; + fourxm->last_audio_frame_count = 0; + + /* set the pts reference (1 pts = 1/90000) */ + s->pts_num = 1; + s->pts_den = 90000; return 0; } static int fourxm_read_packet(AVFormatContext *s, - AVPacket *pkt) + AVPacket *pkt) { FourxmDemuxContext *fourxm = s->priv_data; ByteIOContext *pb = &s->pb; @@ -205,15 +228,19 @@ static int fourxm_read_packet(AVFormatContext *s, int ret = 0; int track_number; int packet_read = 0; + unsigned char header[8]; + int64_t pts_inc; while (!packet_read) { - fourcc_tag = get_be32(pb); - size = get_le32(pb); + if ((ret = get_buffer(&s->pb, header, 8)) < 0) + return ret; + fourcc_tag = LE_32(&header[0]); + size = LE_32(&header[4]); if (fourcc_tag == LIST_TAG) { /* skip the LIST-FRAM tag and get the next fourcc */ - get_be32(pb); - fourcc_tag = get_be32(pb); + get_le32(pb); + fourcc_tag = get_le32(pb); size = get_le32(pb); } @@ -223,23 +250,44 @@ static int fourxm_read_packet(AVFormatContext *s, switch (fourcc_tag) { case ifrm_TAG: -printf (" %cfrm chunk\n", (char)(fourcc_tag >> 24) & 0xFF); -url_fseek(pb, size, SEEK_CUR); - break; case pfrm_TAG: -printf (" %cfrm chunk\n", (char)(fourcc_tag >> 24) & 0xFF); -url_fseek(pb, size, SEEK_CUR); - break; case cfrm_TAG:{ -int unknown= get_le32(pb); -int id= get_le32(pb); -int whole= get_le32(pb); + +int id, whole; static int stats[1000]; + + /* bump the pts if this last data sent out was audio */ + if (fourxm->last_chunk_was_audio) { + fourxm->last_chunk_was_audio = 0; + pts_inc = fourxm->last_audio_frame_count; + pts_inc *= 90000; + pts_inc /= fourxm->tracks[fourxm->selected_track].sample_rate; + fourxm->pts += pts_inc; + } + + /* allocate 8 more bytes than 'size' to account for fourcc + * and size */ + if (av_new_packet(pkt, size + 8)) + return -EIO; + pkt->stream_index = fourxm->video_stream_index; + pkt->pts = fourxm->pts; + memcpy(pkt->data, header, 8); + ret = get_buffer(&s->pb, &pkt->data[8], size); + +if (fourcc_tag == cfrm_TAG) { +id = LE_32(&pkt->data[12]); +whole = LE_32(&pkt->data[16]); stats[id] += size - 12; printf(" cfrm chunk id:%d size:%d whole:%d until now:%d\n", id, size, whole, stats[id]); -url_fseek(pb, size-12, SEEK_CUR); +} + + if (ret < 0) + av_free_packet(pkt); + else + packet_read = 1; break; } + case snd__TAG: printf (" snd_ chunk, "); track_number = get_le32(pb); @@ -248,10 +296,21 @@ printf (" snd_ chunk, "); printf ("correct track, dispatching...\n"); if (av_new_packet(pkt, size)) return -EIO; + pkt->stream_index = + fourxm->tracks[fourxm->selected_track].stream_index; + pkt->pts = fourxm->pts; ret = get_buffer(&s->pb, pkt->data, size); if (ret < 0) av_free_packet(pkt); - packet_read = 1; + else + packet_read = 1; + + /* maintain pts info for the benefit of the video track */ + fourxm->last_chunk_was_audio = 1; + fourxm->last_audio_frame_count = size / + ((fourxm->tracks[fourxm->selected_track].bits / 8) * + fourxm->tracks[fourxm->selected_track].channels); + } else { printf ("wrong track, skipping...\n"); url_fseek(pb, size, SEEK_CUR); |