/*
* 4X Technologies .4xm File Demuxer (no muxer)
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @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 "libavutil/intfloat.h"
#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('', '', '', '')
+#include "internal.h"
+
+#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_be32(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_be32(pb);
+ fourcc_tag = avio_rl32(pb);
typedef struct AudioTrack {
int sample_rate;
int bits;
int channels;
+ int stream_index;
+ int adpcm;
+ int64_t audio_pts;
} AudioTrack;
typedef struct FourxmDemuxContext {
- int width;
- int height;
+ int video_stream_index;
int track_count;
AudioTrack *tracks;
- int selected_track;
+
+ int64_t video_pts;
+ float fps;
} FourxmDemuxContext;
static int fourxm_probe(AVProbeData *p)
{
- if ((BE_32(&p->buf[0]) != RIFF_TAG) ||
- (BE_32(&p->buf[8]) != _4XMV_TAG))
+ if ((AV_RL32(&p->buf[0]) != RIFF_TAG) ||
+ (AV_RL32(&p->buf[8]) != FOURXMV_TAG))
return 0;
-printf (" detected .4xm file\n");
-
return AVPROBE_SCORE_MAX;
}
-static int fourxm_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int parse_vtrk(AVFormatContext *s,
+ FourxmDemuxContext *fourxm, uint8_t *buf, int size,
+ int left)
{
- ByteIOContext *pb = &s->pb;
+ AVStream *st;
+ /* check that there is enough data */
+ if (size != vtrk_SIZE || left < size + 8) {
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* allocate a new AVStream */
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ avpriv_set_pts_info(st, 60, 1, fourxm->fps);
+
+ fourxm->video_stream_index = st->index;
+
+ st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codecpar->codec_id = AV_CODEC_ID_4XM;
+
+ st->codecpar->extradata = av_mallocz(4 + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!st->codecpar->extradata)
+ return AVERROR(ENOMEM);
+ st->codecpar->extradata_size = 4;
+ AV_WL32(st->codecpar->extradata, AV_RL32(buf + 16));
+ st->codecpar->width = AV_RL32(buf + 36);
+ st->codecpar->height = AV_RL32(buf + 40);
+
+ return 0;
+}
+
+
+static int parse_strk(AVFormatContext *s,
+ FourxmDemuxContext *fourxm, uint8_t *buf, int size,
+ int left)
+{
+ AVStream *st;
+ int track;
+ /* check that there is enough data */
+ if (size != strk_SIZE || left < size + 8)
+ return AVERROR_INVALIDDATA;
+
+ track = AV_RL32(buf + 8);
+ if (track < 0)
+ return AVERROR_INVALIDDATA;
+ if (track + 1 > fourxm->track_count) {
+ if (av_reallocp_array(&fourxm->tracks, track + 1, sizeof(AudioTrack)))
+ return AVERROR(ENOMEM);
+ memset(&fourxm->tracks[fourxm->track_count], 0,
+ sizeof(AudioTrack) * (track + 1 - fourxm->track_count));
+ fourxm->track_count = track + 1;
+ }
+ fourxm->tracks[track].adpcm = AV_RL32(buf + 12);
+ fourxm->tracks[track].channels = AV_RL32(buf + 36);
+ fourxm->tracks[track].sample_rate = AV_RL32(buf + 40);
+ fourxm->tracks[track].bits = AV_RL32(buf + 44);
+ fourxm->tracks[track].audio_pts = 0;
+
+ if (fourxm->tracks[track].channels <= 0 ||
+ fourxm->tracks[track].sample_rate <= 0 ||
+ fourxm->tracks[track].bits <= 0) {
+ av_log(s, AV_LOG_ERROR, "audio header invalid\n");
+ return AVERROR_INVALIDDATA;
+ }
+ /* allocate a new AVStream */
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->id = track;
+ avpriv_set_pts_info(st, 60, 1, fourxm->tracks[track].sample_rate);
+
+ fourxm->tracks[track].stream_index = st->index;
+
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_tag = 0;
+ st->codecpar->channels = fourxm->tracks[track].channels;
+ st->codecpar->sample_rate = fourxm->tracks[track].sample_rate;
+ st->codecpar->bits_per_coded_sample = fourxm->tracks[track].bits;
+ st->codecpar->bit_rate = st->codecpar->channels *
+ st->codecpar->sample_rate *
+ st->codecpar->bits_per_coded_sample;
+ st->codecpar->block_align = st->codecpar->channels *
+ st->codecpar->bits_per_coded_sample;
+
+ if (fourxm->tracks[track].adpcm){
+ st->codecpar->codec_id = AV_CODEC_ID_ADPCM_4XM;
+ } else if (st->codecpar->bits_per_coded_sample == 8) {
+ st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
+ } else
+ st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
+
+ return 0;
+}
+
+static int fourxm_read_header(AVFormatContext *s)
+{
+ AVIOContext *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;
- AVStream *st;
+ int i, ret;
fourxm->track_count = 0;
- fourxm->tracks = NULL;
- fourxm->selected_track = 0;
+ fourxm->tracks = NULL;
+ fourxm->fps = 1.0;
/* skip the first 3 32-bit numbers */
- url_fseek(pb, 12, SEEK_CUR);
+ avio_skip(pb, 12);
/* 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_NOMEM;
- if (get_buffer(pb, header, header_size) != header_size)
- return AVERROR_IO;
+ return AVERROR(ENOMEM);
+ 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++) {
- fourcc_tag = BE_32(&header[i]);
- size = LE_32(&header[i + 4]);
-
- if (fourcc_tag == vtrk_TAG) {
- /* check that there is enough data */
- if (size != vtrk_SIZE) {
- av_free(header);
- return AVERROR_INVALIDDATA;
+ fourcc_tag = AV_RL32(&header[i]);
+ size = AV_RL32(&header[i + 4]);
+
+ if (fourcc_tag == std__TAG) {
+ if (header_size - i < 16) {
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
}
- fourxm->width = LE_32(&header[i + 36]);
- fourxm->height = LE_32(&header[i + 40]);
+ fourxm->fps = av_int2float(AV_RL32(&header[i + 12]));
+ } else if (fourcc_tag == vtrk_TAG) {
+ if ((ret = parse_vtrk(s, fourxm, header + i, size,
+ header_size - i)) < 0)
+ goto fail;
+
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]);
- if (current_track + 1 > 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].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]);
+ if ((ret = parse_strk(s, fourxm, header + i, size,
+ header_size - i)) < 0)
+ goto fail;
+
i += 8 + size;
}
}
- 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 (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;
+ 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 */
+
return 0;
+fail:
+ av_freep(&fourxm->tracks);
+ av_free(header);
+ return ret;
}
static int fourxm_read_packet(AVFormatContext *s,
- AVPacket *pkt)
+ AVPacket *pkt)
{
FourxmDemuxContext *fourxm = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int 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) {
-
- 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 (url_feof(pb))
- return -EIO;
-
+ if ((ret = avio_read(s->pb, header, 8)) < 0)
+ return ret;
+ fourcc_tag = AV_RL32(&header[0]);
+ size = AV_RL32(&header[4]);
+ if (pb->eof_reached)
+ return AVERROR(EIO);
switch (fourcc_tag) {
+ case LIST_TAG:
+ /* this is a good time to bump the video pts */
+ fourxm->video_pts++;
- case ifrm_TAG:
-printf (" %cfrm chunk\n", (char)(fourcc_tag >> 24) & 0xFF);
-url_fseek(pb, size, SEEK_CUR);
+ /* skip the LIST-* tag and move on to the next fourcc */
+ avio_rl32(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);
+ 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(EIO);
+ pkt->stream_index = fourxm->video_stream_index;
+ pkt->pts = fourxm->video_pts;
+ pkt->pos = avio_tell(s->pb);
+ memcpy(pkt->data, header, 8);
+ ret = avio_read(s->pb, &pkt->data[8], size);
+
+ if (ret < 0) {
+ av_packet_unref(pkt);
+ } else
+ packet_read = 1;
break;
- }
+
case snd__TAG:
-printf (" snd_ chunk, ");
- track_number = get_le32(pb);
- size = get_le32(pb);
- if (track_number == fourxm->selected_track) {
-printf ("correct track, dispatching...\n");
- if (av_new_packet(pkt, size))
- return -EIO;
- ret = get_buffer(&s->pb, pkt->data, size);
+ track_number = avio_rl32(pb);
+ avio_skip(pb, 4);
+ size -= 8;
+
+ if (track_number < fourxm->track_count &&
+ fourxm->tracks[track_number].channels > 0) {
+ ret = av_get_packet(s->pb, pkt, size);
if (ret < 0)
- av_free_packet(pkt);
+ return AVERROR(EIO);
+ pkt->stream_index =
+ 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[track_number].adpcm)
+ audio_frame_count -= 2 * (fourxm->tracks[track_number].channels);
+ audio_frame_count /= fourxm->tracks[track_number].channels;
+ if (fourxm->tracks[track_number].adpcm) {
+ audio_frame_count *= 2;
+ } else
+ audio_frame_count /=
+ (fourxm->tracks[track_number].bits / 8);
+ fourxm->tracks[track_number].audio_pts += audio_frame_count;
} else {
-printf ("wrong track, skipping...\n");
- url_fseek(pb, size, SEEK_CUR);
+ avio_skip(pb, size);
}
break;
default:
- url_fseek(pb, size, SEEK_CUR);
+ avio_skip(pb, size);
break;
}
}
-
return ret;
}
static int fourxm_read_close(AVFormatContext *s)
{
- FourxmDemuxContext *fourxm = (FourxmDemuxContext *)s->priv_data;
+ FourxmDemuxContext *fourxm = s->priv_data;
- av_free(fourxm->tracks);
+ av_freep(&fourxm->tracks);
return 0;
}
-static AVInputFormat fourxm_iformat = {
- "4xm",
- "4X Technologies format",
- sizeof(FourxmDemuxContext),
- fourxm_probe,
- fourxm_read_header,
- fourxm_read_packet,
- fourxm_read_close,
+AVInputFormat ff_fourxm_demuxer = {
+ .name = "4xm",
+ .long_name = NULL_IF_CONFIG_SMALL("4X Technologies"),
+ .priv_data_size = sizeof(FourxmDemuxContext),
+ .read_probe = fourxm_probe,
+ .read_header = fourxm_read_header,
+ .read_packet = fourxm_read_packet,
+ .read_close = fourxm_read_close,
};
-
-int fourxm_init(void)
-{
- av_register_input_format(&fourxm_iformat);
- return 0;
-}
projects / ffmpeg / blobdiff