#include "avformat.h"
-#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
-#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
- (((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 ) )
-
-#define RIFF_TAG FOURCC_TAG('R', 'I', 'F', 'F')
-#define _4XMV_TAG FOURCC_TAG('4', 'X', 'M', 'V')
-#define LIST_TAG FOURCC_TAG('L', 'I', 'S', 'T')
-#define HEAD_TAG FOURCC_TAG('H', 'E', 'A', 'D')
-#define TRK__TAG FOURCC_TAG('T', 'R', 'K', '_')
-#define MOVI_TAG FOURCC_TAG('M', 'O', 'V', 'I')
-#define VTRK_TAG FOURCC_TAG('V', 'T', 'R', 'K')
-#define STRK_TAG FOURCC_TAG('S', 'T', 'R', 'K')
-#define name_TAG FOURCC_TAG('n', 'a', 'm', 'e')
-#define vtrk_TAG FOURCC_TAG('v', 't', 'r', 'k')
-#define strk_TAG FOURCC_TAG('s', 't', 'r', 'k')
-#define ifrm_TAG FOURCC_TAG('i', 'f', 'r', 'm')
-#define pfrm_TAG FOURCC_TAG('p', 'f', 'r', 'm')
-#define cfrm_TAG FOURCC_TAG('c', 'f', 'r', 'm')
-#define snd__TAG FOURCC_TAG('s', 'n', 'd', '_')
-#define _TAG FOURCC_TAG('', '', '', '')
+#define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
+#define _4XMV_TAG MKTAG('4', 'X', 'M', 'V')
+#define LIST_TAG MKTAG('L', 'I', 'S', 'T')
+#define HEAD_TAG MKTAG('H', 'E', 'A', 'D')
+#define TRK__TAG MKTAG('T', 'R', 'K', '_')
+#define MOVI_TAG MKTAG('M', 'O', 'V', 'I')
+#define VTRK_TAG MKTAG('V', 'T', 'R', 'K')
+#define STRK_TAG MKTAG('S', 'T', 'R', 'K')
+#define std__TAG MKTAG('s', 't', 'd', '_')
+#define name_TAG MKTAG('n', 'a', 'm', 'e')
+#define vtrk_TAG MKTAG('v', 't', 'r', 'k')
+#define strk_TAG MKTAG('s', 't', 'r', 'k')
+#define ifrm_TAG MKTAG('i', 'f', 'r', 'm')
+#define pfrm_TAG MKTAG('p', 'f', 'r', 'm')
+#define cfrm_TAG MKTAG('c', 'f', 'r', 'm')
+#define snd__TAG MKTAG('s', 'n', 'd', '_')
#define vtrk_SIZE 0x44
#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;
+ int adpcm;
} AudioTrack;
typedef struct FourxmDemuxContext {
int width;
int height;
+ int video_stream_index;
int track_count;
AudioTrack *tracks;
int selected_track;
+
+ int64_t audio_pts;
+ int64_t video_pts;
+ int video_pts_inc;
+ float fps;
} FourxmDemuxContext;
+static float get_le_float(unsigned char *buffer)
+{
+ float f;
+ unsigned char *float_buffer = (unsigned char *)&f;
+
+#ifdef WORDS_BIGENDIAN
+ float_buffer[0] = buffer[3];
+ float_buffer[1] = buffer[2];
+ float_buffer[2] = buffer[1];
+ float_buffer[3] = buffer[0];
+#else
+ float_buffer[0] = buffer[0];
+ float_buffer[1] = buffer[1];
+ float_buffer[2] = buffer[2];
+ float_buffer[3] = buffer[3];
+#endif
+
+ return f;
+}
+
static int fourxm_probe(AVProbeData *p)
{
- if ((BE_32(&p->buf[0]) != RIFF_TAG) ||
- (BE_32(&p->buf[8]) != _4XMV_TAG))
+ if (p->buf_size < 12)
return 0;
-printf (" detected .4xm file\n");
+ if ((LE_32(&p->buf[0]) != RIFF_TAG) ||
+ (LE_32(&p->buf[8]) != _4XMV_TAG))
+ return 0;
return AVPROBE_SCORE_MAX;
}
static int fourxm_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+ AVFormatParameters *ap)
{
ByteIOContext *pb = &s->pb;
unsigned int fourcc_tag;
fourxm->track_count = 0;
fourxm->tracks = NULL;
fourxm->selected_track = 0;
+ fourxm->fps = 1.0;
/* skip the first 3 32-bit numbers */
url_fseek(pb, 12, SEEK_CUR);
/* 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) {
+ if (fourcc_tag == std__TAG) {
+ fourxm->fps = get_le_float(&header[i + 12]);
+ fourxm->video_pts_inc = (int)(90000.0 / fourxm->fps);
+ } else if (fourcc_tag == vtrk_TAG) {
/* check that there is enough data */
if (size != vtrk_SIZE) {
av_free(header);
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;
+ av_set_pts_info(st, 33, 1, 90000);
+
+ fourxm->video_stream_index = st->index;
+
+ st->codec.frame_rate = fourxm->fps;
+ st->codec.frame_rate_base = 1.0;
+ 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) {
}
current_track = LE_32(&header[i + 8]);
if (current_track + 1 > fourxm->track_count) {
- fourxm->track_count++;
- fourxm->tracks = av_realloc(fourxm->tracks, fourxm->track_count);
+ fourxm->track_count = current_track + 1;
+ fourxm->tracks = av_realloc(fourxm->tracks,
+ fourxm->track_count * sizeof(AudioTrack));
if (!fourxm->tracks) {
av_free(header);
return AVERROR_NOMEM;
}
}
+ fourxm->tracks[current_track].adpcm = LE_32(&header[i + 12]);
fourxm->tracks[current_track].channels = LE_32(&header[i + 36]);
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;
+
+ /* set the pts reference (1 pts = 1/90000) */
+ av_set_pts_info(st, 33, 1, 90000);
+
+ 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 (fourxm->tracks[current_track].adpcm)
+ st->codec.codec_id = CODEC_ID_ADPCM_4XM;
+ else if (st->codec.bits_per_sample == 8)
+ st->codec.codec_id = CODEC_ID_PCM_U8;
+ else
+ st->codec.codec_id = CODEC_ID_PCM_S16LE;
}
}
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->video_pts = -fourxm->video_pts_inc; /* first frame will push to 0 */
+ fourxm->audio_pts = 0;
return 0;
}
static int fourxm_read_packet(AVFormatContext *s,
- AVPacket *pkt)
+ AVPacket *pkt)
{
FourxmDemuxContext *fourxm = s->priv_data;
ByteIOContext *pb = &s->pb;
unsigned int fourcc_tag;
- unsigned int size;
+ unsigned int size, out_size;
int ret = 0;
int track_number;
int packet_read = 0;
+ unsigned char header[8];
+ int64_t pts_inc;
+ int audio_frame_count;
while (!packet_read) {
- fourcc_tag = get_be32(pb);
- size = get_le32(pb);
- if (fourcc_tag == LIST_TAG) {
- /* skip the LIST-FRAM tag and get the next fourcc */
- get_be32(pb);
- 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 (url_feof(pb))
return -EIO;
-
switch (fourcc_tag) {
- case ifrm_TAG:
-printf (" %cfrm chunk\n", (char)(fourcc_tag >> 24) & 0xFF);
-url_fseek(pb, size, SEEK_CUR);
+ case LIST_TAG:
+ /* this is a good time to bump the video pts */
+ fourxm->video_pts += fourxm->video_pts_inc;
+
+ /* skip the LIST-* tag and move on to the next fourcc */
+ get_le32(pb);
break;
+
+ case ifrm_TAG:
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);
-static int stats[1000];
-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);
+
+ /* 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->video_pts;
+ memcpy(pkt->data, header, 8);
+ ret = get_buffer(&s->pb, &pkt->data[8], size);
+
+ if (ret < 0)
+ av_free_packet(pkt);
+ else
+ packet_read = 1;
break;
}
+
case snd__TAG:
-printf (" snd_ chunk, ");
track_number = get_le32(pb);
- size = get_le32(pb);
+ out_size= get_le32(pb);
+ size-=8;
+
if (track_number == fourxm->selected_track) {
-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->audio_pts;
ret = get_buffer(&s->pb, pkt->data, size);
if (ret < 0)
av_free_packet(pkt);
- packet_read = 1;
+ else
+ packet_read = 1;
+
+ /* pts accounting */
+ audio_frame_count = size;
+ if (fourxm->tracks[fourxm->selected_track].adpcm)
+ audio_frame_count -=
+ 2 * (fourxm->tracks[fourxm->selected_track].channels);
+ audio_frame_count /=
+ fourxm->tracks[fourxm->selected_track].channels;
+ if (fourxm->tracks[fourxm->selected_track].adpcm)
+ audio_frame_count *= 2;
+ else
+ audio_frame_count /=
+ (fourxm->tracks[fourxm->selected_track].bits / 8);
+ pts_inc = audio_frame_count;
+ pts_inc *= 90000;
+ pts_inc /= fourxm->tracks[fourxm->selected_track].sample_rate;
+ fourxm->audio_pts += pts_inc;
+
} else {
-printf ("wrong track, skipping...\n");
url_fseek(pb, size, SEEK_CUR);
}
break;
break;
}
}
-
return ret;
}
projects / ffmpeg / blobdiff