* 4X Technologies .4xm File Demuxer (no muxer)
* Copyright (c) 2003 The ffmpeg Project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
#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
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 (p->buf_size < 12)
- return 0;
-
- if ((LE_32(&p->buf[0]) != RIFF_TAG) ||
- (LE_32(&p->buf[8]) != _4XMV_TAG))
+ if ((AV_RL32(&p->buf[0]) != RIFF_TAG) ||
+ (AV_RL32(&p->buf[8]) != _4XMV_TAG))
return 0;
return AVPROBE_SCORE_MAX;
static int fourxm_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int size;
int header_size;
- FourxmDemuxContext *fourxm = (FourxmDemuxContext *)s->priv_data;
+ FourxmDemuxContext *fourxm = s->priv_data;
unsigned char *header;
int i;
int current_track = -1;
/* allocate space for the header and load the whole thing */
header = av_malloc(header_size);
if (!header)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
if (get_buffer(pb, header, header_size) != header_size)
- return AVERROR_IO;
+ 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++) {
- fourcc_tag = LE_32(&header[i]);
- size = LE_32(&header[i + 4]);
+ fourcc_tag = AV_RL32(&header[i]);
+ size = AV_RL32(&header[i + 4]);
if (fourcc_tag == std__TAG) {
- fourxm->fps = get_le_float(&header[i + 12]);
+ fourxm->fps = av_int2flt(AV_RL32(&header[i + 12]));
} else if (fourcc_tag == vtrk_TAG) {
/* check that there is enough data */
if (size != vtrk_SIZE) {
av_free(header);
return AVERROR_INVALIDDATA;
}
- fourxm->width = LE_32(&header[i + 36]);
- fourxm->height = LE_32(&header[i + 40]);
- i += 8 + size;
+ 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_NOMEM;
+ return AVERROR(ENOMEM);
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_id = CODEC_ID_4XM;
- st->codec.codec_tag = 0; /* no fourcc */
- st->codec.width = fourxm->width;
- st->codec.height = fourxm->height;
+ st->codec->codec_type = CODEC_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->height = fourxm->height;
+ i += 8 + size;
} else if (fourcc_tag == strk_TAG) {
/* check that there is enough data */
if (size != strk_SIZE) {
av_free(header);
return AVERROR_INVALIDDATA;
}
- current_track = LE_32(&header[i + 8]);
+ current_track = AV_RL32(&header[i + 8]);
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->tracks = av_realloc(fourxm->tracks,
fourxm->track_count * sizeof(AudioTrack));
if (!fourxm->tracks) {
av_free(header);
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
}
}
- 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]);
+ 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]);
i += 8 + size;
/* allocate a new AVStream */
st = av_new_stream(s, current_track);
if (!st)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
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_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;
+ st->codec->codec_type = CODEC_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.codec_id = CODEC_ID_ADPCM_4XM;
- else if (st->codec.bits_per_sample == 8)
- st->codec.codec_id = CODEC_ID_PCM_U8;
+ 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;
+ st->codec->codec_id = CODEC_ID_PCM_S16LE;
}
}
AVPacket *pkt)
{
FourxmDemuxContext *fourxm = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int size, out_size;
int ret = 0;
while (!packet_read) {
- if ((ret = get_buffer(&s->pb, header, 8)) < 0)
+ if ((ret = get_buffer(s->pb, header, 8)) < 0)
return ret;
- fourcc_tag = LE_32(&header[0]);
- size = LE_32(&header[4]);
+ fourcc_tag = AV_RL32(&header[0]);
+ size = AV_RL32(&header[4]);
if (url_feof(pb))
- return AVERROR_IO;
+ return AVERROR(EIO);
switch (fourcc_tag) {
case LIST_TAG:
case ifrm_TAG:
case pfrm_TAG:
- case cfrm_TAG:{
+ case cfrm_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_IO;
+ 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 = get_buffer(s->pb, &pkt->data[8], size);
if (ret < 0)
av_free_packet(pkt);
size-=8;
if (track_number == fourxm->selected_track) {
- ret= av_get_packet(&s->pb, pkt, size);
+ ret= av_get_packet(s->pb, pkt, size);
if(ret<0)
- return AVERROR_IO;
- pkt->stream_index =
+ return AVERROR(EIO);
+ pkt->stream_index =
fourxm->tracks[fourxm->selected_track].stream_index;
pkt->pts = fourxm->audio_pts;
packet_read = 1;
/* pts accounting */
audio_frame_count = size;
if (fourxm->tracks[fourxm->selected_track].adpcm)
- audio_frame_count -=
+ 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
+ else
audio_frame_count /=
(fourxm->tracks[fourxm->selected_track].bits / 8);
fourxm->audio_pts += audio_frame_count;
static int fourxm_read_close(AVFormatContext *s)
{
- FourxmDemuxContext *fourxm = (FourxmDemuxContext *)s->priv_data;
+ FourxmDemuxContext *fourxm = s->priv_data;
av_free(fourxm->tracks);
return 0;
}
-static AVInputFormat fourxm_iformat = {
+AVInputFormat fourxm_demuxer = {
"4xm",
"4X Technologies format",
sizeof(FourxmDemuxContext),
fourxm_read_packet,
fourxm_read_close,
};
-
-int fourxm_init(void)
-{
- av_register_input_format(&fourxm_iformat);
- return 0;
-}
projects / ffmpeg / blobdiff