*/
/**
- * @file 4xm.c
+ * @file
* 4X Technologies file demuxer
* by Mike Melanson (melanson@pcisys.net)
* for more information on the .4xm file format, visit:
* http://www.pcisys.net/~melanson/codecs/
*/
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
-#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 ifr2_TAG MKTAG('i', 'f', 'r', '2')
-#define pfr2_TAG MKTAG('p', 'f', 'r', '2')
-#define cfr2_TAG MKTAG('c', 'f', 'r', '2')
-#define snd__TAG MKTAG('s', 'n', 'd', '_')
+#define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
+#define FOURXMV_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 ifr2_TAG MKTAG('i', 'f', 'r', '2')
+#define pfr2_TAG MKTAG('p', 'f', 'r', '2')
+#define cfr2_TAG MKTAG('c', 'f', 'r', '2')
+#define snd__TAG MKTAG('s', 'n', 'd', '_')
#define vtrk_SIZE 0x44
#define strk_SIZE 0x28
#define GET_LIST_HEADER() \
- fourcc_tag = get_le32(pb); \
- size = get_le32(pb); \
+ fourcc_tag = avio_rl32(pb); \
+ size = avio_rl32(pb); \
if (fourcc_tag != LIST_TAG) \
return AVERROR_INVALIDDATA; \
- fourcc_tag = get_le32(pb);
+ fourcc_tag = avio_rl32(pb);
typedef struct AudioTrack {
int sample_rate;
int channels;
int stream_index;
int adpcm;
+ int64_t audio_pts;
} AudioTrack;
typedef struct FourxmDemuxContext {
int video_stream_index;
int track_count;
AudioTrack *tracks;
- int selected_track;
- int64_t audio_pts;
int64_t video_pts;
float fps;
} FourxmDemuxContext;
static int fourxm_probe(AVProbeData *p)
{
if ((AV_RL32(&p->buf[0]) != RIFF_TAG) ||
- (AV_RL32(&p->buf[8]) != _4XMV_TAG))
+ (AV_RL32(&p->buf[8]) != FOURXMV_TAG))
return 0;
return AVPROBE_SCORE_MAX;
static int fourxm_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int size;
int header_size;
FourxmDemuxContext *fourxm = s->priv_data;
unsigned char *header;
- int i;
- int current_track = -1;
+ int i, ret;
AVStream *st;
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);
+ avio_seek(pb, 12, SEEK_CUR);
/* check for LIST-HEAD */
GET_LIST_HEADER();
header_size = size - 4;
- if (fourcc_tag != HEAD_TAG)
+ if (fourcc_tag != HEAD_TAG || header_size < 0)
return AVERROR_INVALIDDATA;
/* allocate space for the header and load the whole thing */
header = av_malloc(header_size);
if (!header)
return AVERROR(ENOMEM);
- if (get_buffer(pb, header, header_size) != header_size)
+ if (avio_read(pb, header, header_size) != header_size){
+ av_free(header);
return AVERROR(EIO);
+ }
/* take the lazy approach and search for any and all vtrk and strk chunks */
for (i = 0; i < header_size - 8; i++) {
} else if (fourcc_tag == vtrk_TAG) {
/* check that there is enough data */
if (size != vtrk_SIZE) {
- av_free(header);
- return AVERROR_INVALIDDATA;
+ ret= AVERROR_INVALIDDATA;
+ goto fail;
}
- fourxm->width = AV_RL32(&header[i + 36]);
+ fourxm->width = AV_RL32(&header[i + 36]);
fourxm->height = AV_RL32(&header[i + 40]);
/* allocate a new AVStream */
st = av_new_stream(s, 0);
- if (!st)
- return AVERROR(ENOMEM);
+ if (!st){
+ ret= AVERROR(ENOMEM);
+ goto fail;
+ }
av_set_pts_info(st, 60, 1, fourxm->fps);
fourxm->video_stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_VIDEO;
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_4XM;
st->codec->extradata_size = 4;
st->codec->extradata = av_malloc(4);
AV_WL32(st->codec->extradata, AV_RL32(&header[i + 16]));
- st->codec->width = fourxm->width;
+ st->codec->width = fourxm->width;
st->codec->height = fourxm->height;
i += 8 + size;
} else if (fourcc_tag == strk_TAG) {
+ int current_track;
/* check that there is enough data */
if (size != strk_SIZE) {
- av_free(header);
- return AVERROR_INVALIDDATA;
+ ret= AVERROR_INVALIDDATA;
+ goto fail;
}
current_track = AV_RL32(&header[i + 8]);
+ if((unsigned)current_track >= UINT_MAX / sizeof(AudioTrack) - 1){
+ av_log(s, AV_LOG_ERROR, "current_track too large\n");
+ ret= -1;
+ goto fail;
+ }
if (current_track + 1 > fourxm->track_count) {
fourxm->track_count = current_track + 1;
- if((unsigned)fourxm->track_count >= UINT_MAX / sizeof(AudioTrack))
- return -1;
fourxm->tracks = av_realloc(fourxm->tracks,
fourxm->track_count * sizeof(AudioTrack));
if (!fourxm->tracks) {
- av_free(header);
- return AVERROR(ENOMEM);
+ ret= AVERROR(ENOMEM);
+ goto fail;
}
}
- fourxm->tracks[current_track].adpcm = AV_RL32(&header[i + 12]);
- fourxm->tracks[current_track].channels = AV_RL32(&header[i + 36]);
+ fourxm->tracks[current_track].adpcm = AV_RL32(&header[i + 12]);
+ fourxm->tracks[current_track].channels = AV_RL32(&header[i + 36]);
fourxm->tracks[current_track].sample_rate = AV_RL32(&header[i + 40]);
- fourxm->tracks[current_track].bits = AV_RL32(&header[i + 44]);
+ fourxm->tracks[current_track].bits = AV_RL32(&header[i + 44]);
+ fourxm->tracks[current_track].audio_pts = 0;
+ if( fourxm->tracks[current_track].channels <= 0
+ || fourxm->tracks[current_track].sample_rate <= 0
+ || fourxm->tracks[current_track].bits < 0){
+ av_log(s, AV_LOG_ERROR, "audio header invalid\n");
+ ret= -1;
+ goto fail;
+ }
i += 8 + size;
/* allocate a new AVStream */
st = av_new_stream(s, current_track);
- if (!st)
- return AVERROR(ENOMEM);
+ if (!st){
+ ret= AVERROR(ENOMEM);
+ goto fail;
+ }
av_set_pts_info(st, 60, 1, fourxm->tracks[current_track].sample_rate);
fourxm->tracks[current_track].stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = 0;
- 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->channels = fourxm->tracks[current_track].channels;
+ st->codec->sample_rate = fourxm->tracks[current_track].sample_rate;
+ st->codec->bits_per_coded_sample = fourxm->tracks[current_track].bits;
+ st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
+ st->codec->bits_per_coded_sample;
+ st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
+ if (fourxm->tracks[current_track].adpcm){
st->codec->codec_id = CODEC_ID_ADPCM_4XM;
- else if (st->codec->bits_per_sample == 8)
+ }else if (st->codec->bits_per_coded_sample == 8){
st->codec->codec_id = CODEC_ID_PCM_U8;
- else
+ }else
st->codec->codec_id = CODEC_ID_PCM_S16LE;
}
}
- av_free(header);
-
/* skip over the LIST-MOVI chunk (which is where the stream should be */
GET_LIST_HEADER();
- if (fourcc_tag != MOVI_TAG)
- return AVERROR_INVALIDDATA;
+ if (fourcc_tag != MOVI_TAG){
+ ret= AVERROR_INVALIDDATA;
+ goto fail;
+ }
+ av_free(header);
/* initialize context members */
fourxm->video_pts = -1; /* first frame will push to 0 */
- fourxm->audio_pts = 0;
return 0;
+fail:
+ av_freep(&fourxm->tracks);
+ av_free(header);
+ return ret;
}
static int fourxm_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
FourxmDemuxContext *fourxm = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int size, out_size;
int ret = 0;
- int track_number;
+ unsigned int track_number;
int packet_read = 0;
unsigned char header[8];
int audio_frame_count;
while (!packet_read) {
- if ((ret = get_buffer(&s->pb, header, 8)) < 0)
+ if ((ret = avio_read(s->pb, header, 8)) < 0)
return ret;
fourcc_tag = AV_RL32(&header[0]);
size = AV_RL32(&header[4]);
fourxm->video_pts ++;
/* skip the LIST-* tag and move on to the next fourcc */
- get_le32(pb);
+ avio_rl32(pb);
break;
case ifrm_TAG:
case ifr2_TAG:
case pfr2_TAG:
case cfr2_TAG:
- {
-
/* allocate 8 more bytes than 'size' to account for fourcc
* and size */
if (size + 8 < size || av_new_packet(pkt, size + 8))
return AVERROR(EIO);
pkt->stream_index = fourxm->video_stream_index;
pkt->pts = fourxm->video_pts;
- pkt->pos = url_ftell(&s->pb);
+ pkt->pos = url_ftell(s->pb);
memcpy(pkt->data, header, 8);
- ret = get_buffer(&s->pb, &pkt->data[8], size);
+ ret = avio_read(s->pb, &pkt->data[8], size);
- if (ret < 0)
+ if (ret < 0){
av_free_packet(pkt);
- else
+ }else
packet_read = 1;
break;
- }
case snd__TAG:
- track_number = get_le32(pb);
- out_size= get_le32(pb);
+ track_number = avio_rl32(pb);
+ out_size= avio_rl32(pb);
size-=8;
- if (track_number == fourxm->selected_track) {
- ret= av_get_packet(&s->pb, pkt, size);
+ if (track_number < fourxm->track_count && fourxm->tracks[track_number].channels>0) {
+ ret= av_get_packet(s->pb, pkt, size);
if(ret<0)
return AVERROR(EIO);
pkt->stream_index =
- fourxm->tracks[fourxm->selected_track].stream_index;
- pkt->pts = fourxm->audio_pts;
+ fourxm->tracks[track_number].stream_index;
+ pkt->pts = fourxm->tracks[track_number].audio_pts;
packet_read = 1;
/* pts accounting */
audio_frame_count = size;
- if (fourxm->tracks[fourxm->selected_track].adpcm)
+ if (fourxm->tracks[track_number].adpcm)
audio_frame_count -=
- 2 * (fourxm->tracks[fourxm->selected_track].channels);
+ 2 * (fourxm->tracks[track_number].channels);
audio_frame_count /=
- fourxm->tracks[fourxm->selected_track].channels;
- if (fourxm->tracks[fourxm->selected_track].adpcm)
+ fourxm->tracks[track_number].channels;
+ if (fourxm->tracks[track_number].adpcm){
audio_frame_count *= 2;
- else
+ }else
audio_frame_count /=
- (fourxm->tracks[fourxm->selected_track].bits / 8);
- fourxm->audio_pts += audio_frame_count;
+ (fourxm->tracks[track_number].bits / 8);
+ fourxm->tracks[track_number].audio_pts += audio_frame_count;
} else {
- url_fseek(pb, size, SEEK_CUR);
+ avio_seek(pb, size, SEEK_CUR);
}
break;
default:
- url_fseek(pb, size, SEEK_CUR);
+ avio_seek(pb, size, SEEK_CUR);
break;
}
}
{
FourxmDemuxContext *fourxm = s->priv_data;
- av_free(fourxm->tracks);
+ av_freep(&fourxm->tracks);
return 0;
}
-AVInputFormat fourxm_demuxer = {
+AVInputFormat ff_fourxm_demuxer = {
"4xm",
- "4X Technologies format",
+ NULL_IF_CONFIG_SMALL("4X Technologies format"),
sizeof(FourxmDemuxContext),
fourxm_probe,
fourxm_read_header,