diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/4xm.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/4xm.c | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/contrib/ffmpeg/libavformat/4xm.c b/contrib/ffmpeg/libavformat/4xm.c deleted file mode 100644 index bf10b9e82..000000000 --- a/contrib/ffmpeg/libavformat/4xm.c +++ /dev/null @@ -1,331 +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 4xm.c - * 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 "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 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); \ - if (fourcc_tag != LIST_TAG) \ - return AVERROR_INVALIDDATA; \ - 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; - float fps; -} FourxmDemuxContext; - -static int fourxm_probe(AVProbeData *p) -{ - if (p->buf_size < 12) - return 0; - - 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; - unsigned int fourcc_tag; - unsigned int size; - int header_size; - FourxmDemuxContext *fourxm = (FourxmDemuxContext *)s->priv_data; - unsigned char *header; - int i; - int current_track = -1; - 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); - - /* check for LIST-HEAD */ - GET_LIST_HEADER(); - header_size = size - 4; - if (fourcc_tag != HEAD_TAG) - 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; - - /* 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 (fourcc_tag == std__TAG) { - 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 = AV_RL32(&header[i + 36]); - fourxm->height = AV_RL32(&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, 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; - - } else if (fourcc_tag == strk_TAG) { - /* check that there is enough data */ - if (size != strk_SIZE) { - av_free(header); - return AVERROR_INVALIDDATA; - } - 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->track_count * sizeof(AudioTrack)); - if (!fourxm->tracks) { - av_free(header); - return AVERROR_NOMEM; - } - } - 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; - - 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 = 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; - 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; - - /* initialize context members */ - fourxm->video_pts = -1; /* first frame will push to 0 */ - fourxm->audio_pts = 0; - - return 0; -} - -static int fourxm_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - FourxmDemuxContext *fourxm = s->priv_data; - ByteIOContext *pb = &s->pb; - unsigned int fourcc_tag; - unsigned int size, out_size; - int ret = 0; - 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) - return ret; - fourcc_tag = AV_RL32(&header[0]); - size = AV_RL32(&header[4]); - if (url_feof(pb)) - return AVERROR_IO; - 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 */ - get_le32(pb); - break; - - case ifrm_TAG: - case pfrm_TAG: - case cfrm_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; - pkt->stream_index = fourxm->video_stream_index; - pkt->pts = fourxm->video_pts; - pkt->pos = url_ftell(&s->pb); - 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: - track_number = get_le32(pb); - out_size= get_le32(pb); - size-=8; - - if (track_number == fourxm->selected_track) { - ret= av_get_packet(&s->pb, pkt, size); - if(ret<0) - return AVERROR_IO; - 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 -= - 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); - fourxm->audio_pts += audio_frame_count; - - } else { - url_fseek(pb, size, SEEK_CUR); - } - break; - - default: - url_fseek(pb, size, SEEK_CUR); - break; - } - } - return ret; -} - -static int fourxm_read_close(AVFormatContext *s) -{ - FourxmDemuxContext *fourxm = (FourxmDemuxContext *)s->priv_data; - - av_free(fourxm->tracks); - - return 0; -} - -AVInputFormat fourxm_demuxer = { - "4xm", - "4X Technologies format", - sizeof(FourxmDemuxContext), - fourxm_probe, - fourxm_read_header, - fourxm_read_packet, - fourxm_read_close, -}; |