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Diffstat (limited to 'ffmpeg/libavformat/4xm.c')
-rw-r--r--ffmpeg/libavformat/4xm.c384
1 files changed, 0 insertions, 384 deletions
diff --git a/ffmpeg/libavformat/4xm.c b/ffmpeg/libavformat/4xm.c
deleted file mode 100644
index 23279c4..0000000
--- a/ffmpeg/libavformat/4xm.c
+++ /dev/null
@@ -1,384 +0,0 @@
-/*
- * 4X Technologies .4xm File Demuxer (no muxer)
- * Copyright (c) 2003 The ffmpeg Project
- *
- * 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 2.1 of the License, or (at your option) any later version.
- *
- * 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @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"
-#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 = avio_rl32(pb); \
- size = avio_rl32(pb); \
- if (fourcc_tag != LIST_TAG) \
- return AVERROR_INVALIDDATA; \
- 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 video_stream_index;
- int track_count;
- AudioTrack *tracks;
-
- 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]) != FOURXMV_TAG))
- return 0;
-
- return AVPROBE_SCORE_MAX;
-}
-
-static int parse_vtrk(AVFormatContext *s,
- FourxmDemuxContext *fourxm, uint8_t *buf, int size,
- int left)
-{
- 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->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_4XM;
- st->codec->extradata_size = 4;
- st->codec->extradata = av_malloc(4);
- AV_WL32(st->codec->extradata, AV_RL32(buf + 16));
- st->codec->width = AV_RL32(buf + 36);
- st->codec->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 ((unsigned)track >= UINT_MAX / sizeof(AudioTrack) - 1) {
- av_log(s, AV_LOG_ERROR, "current_track too large\n");
- 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;
- }
- if (!fourxm->tracks[track].adpcm && fourxm->tracks[track].bits<8) {
- av_log(s, AV_LOG_ERROR, "bits unspecified for non ADPCM\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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_tag = 0;
- st->codec->channels = fourxm->tracks[track].channels;
- st->codec->sample_rate = fourxm->tracks[track].sample_rate;
- st->codec->bits_per_coded_sample = fourxm->tracks[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[track].adpcm){
- st->codec->codec_id = AV_CODEC_ID_ADPCM_4XM;
- } else if (st->codec->bits_per_coded_sample == 8) {
- st->codec->codec_id = AV_CODEC_ID_PCM_U8;
- } else
- st->codec->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 = s->priv_data;
- unsigned char *header;
- int i, ret;
-
- fourxm->track_count = 0;
- fourxm->tracks = NULL;
- fourxm->fps = 1.0;
-
- /* skip the first 3 32-bit numbers */
- avio_skip(pb, 12);
-
- /* check for LIST-HEAD */
- GET_LIST_HEADER();
- header_size = size - 4;
- 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 (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 = AV_RL32(&header[i]);
- size = AV_RL32(&header[i + 4]);
- if (size > header_size - i - 8 && (fourcc_tag == vtrk_TAG || fourcc_tag == strk_TAG)) {
- av_log(s, AV_LOG_ERROR, "chunk larger than array %d>%d\n", size, header_size - i - 8);
- return AVERROR_INVALIDDATA;
- }
-
- if (fourcc_tag == std__TAG) {
- if (header_size - i < 16) {
- av_log(s, AV_LOG_ERROR, "std TAG truncated\n");
- ret = AVERROR_INVALIDDATA;
- goto fail;
- }
- 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) {
- if ((ret = parse_strk(s, fourxm, header + i, size,
- header_size - i)) < 0)
- goto fail;
-
- i += 8 + size;
- }
- }
-
- /* skip over the LIST-MOVI chunk (which is where the stream should be */
- GET_LIST_HEADER();
- 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)
-{
- FourxmDemuxContext *fourxm = s->priv_data;
- AVIOContext *pb = s->pb;
- unsigned int fourcc_tag;
- unsigned int size;
- int ret = 0;
- unsigned int track_number;
- int packet_read = 0;
- unsigned char header[8];
- int audio_frame_count;
-
- while (!packet_read) {
- if ((ret = avio_read(s->pb, header, 8)) < 0)
- return ret;
- fourcc_tag = AV_RL32(&header[0]);
- size = AV_RL32(&header[4]);
- if (url_feof(pb))
- return AVERROR(EIO);
- switch (fourcc_tag) {
- case LIST_TAG:
- /* this is a good time to bump the video pts */
- fourxm->video_pts++;
-
- /* skip the LIST-* tag and move on to the next fourcc */
- avio_rl32(pb);
- break;
-
- case ifrm_TAG:
- case pfrm_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(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_free_packet(pkt);
- } else {
- packet_read = 1;
- av_shrink_packet(pkt, ret + 8);
- }
- break;
-
- case snd__TAG:
- 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)
- 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 {
- avio_skip(pb, size);
- }
- break;
-
- default:
- avio_skip(pb, size);
- break;
- }
- }
- return ret;
-}
-
-static int fourxm_read_close(AVFormatContext *s)
-{
- FourxmDemuxContext *fourxm = s->priv_data;
-
- av_freep(&fourxm->tracks);
-
- return 0;
-}
-
-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,
-};
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