X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2F4xm.c;h=631f8216a55157d8ce19fa3bed46221355e0e98a;hb=c040badb703e773a98f37392e9bc609e1a0b7439;hp=5058e1192e2b42e5532098b8e844992e2705f234;hpb=ff70e60176056daf646109b8e42654a3036fa02b;p=ffmpeg diff --git a/libavformat/4xm.c b/libavformat/4xm.c index 5058e1192e2..631f8216a55 100644 --- a/libavformat/4xm.c +++ b/libavformat/4xm.c @@ -2,47 +2,53 @@ * 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 + * 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 + * @file libavformat/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 "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 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 @@ -60,6 +66,7 @@ typedef struct AudioTrack { int channels; int stream_index; int adpcm; + int64_t audio_pts; } AudioTrack; typedef struct FourxmDemuxContext { @@ -68,20 +75,15 @@ 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 (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]) != FOURXMV_TAG)) return 0; return AVPROBE_SCORE_MAX; @@ -90,19 +92,17 @@ static int fourxm_probe(AVProbeData *p) 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; + 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 */ @@ -111,132 +111,149 @@ static int fourxm_read_header(AVFormatContext *s, /* 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 (get_buffer(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 = 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 = av_int2flt(LE_32(&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; + ret= AVERROR_INVALIDDATA; + goto fail; } - 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; + 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_id = CODEC_ID_4XM; - st->codec->codec_tag = 0; /* no fourcc */ - st->codec->width = fourxm->width; + 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) { + 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; } - current_track = LE_32(&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; + ret= AVERROR(ENOMEM); + goto fail; } } - 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]); + fourxm->tracks[current_track].audio_pts = 0; i += 8 + size; /* allocate a new AVStream */ st = av_new_stream(s, current_track); - if (!st) - return AVERROR_NOMEM; + 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_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 (fourxm->tracks[current_track].adpcm) + 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_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; + ByteIOContext *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 = 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: @@ -249,52 +266,53 @@ static int fourxm_read_packet(AVFormatContext *s, 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) + 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); size-=8; - if (track_number == fourxm->selected_track) { - ret= av_get_packet(&s->pb, pkt, size); + if (track_number < fourxm->track_count) { + ret= av_get_packet(s->pb, pkt, size); if(ret<0) - return AVERROR_IO; + 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); @@ -311,16 +329,16 @@ static int fourxm_read_packet(AVFormatContext *s, 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; } AVInputFormat fourxm_demuxer = { "4xm", - "4X Technologies format", + NULL_IF_CONFIG_SMALL("4X Technologies format"), sizeof(FourxmDemuxContext), fourxm_probe, fourxm_read_header,