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https://git.ffmpeg.org/ffmpeg.git
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c1e439d7e9
It is not uncommon to find code where the caller thinks to know better what the return value should be than the callee. E.g. something like "if (av_new_packet(pkt, size) < 0) return AVERROR(ENOMEM);". This commit changes several instances of this to instead forward the actual error. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
260 lines
7.7 KiB
C
260 lines
7.7 KiB
C
/*
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* Beam Software SIFF demuxer
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* Copyright (c) 2007 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/channel_layout.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.h"
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#include "avio_internal.h"
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enum SIFFTags {
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TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
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TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
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TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
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TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
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TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
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TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
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};
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enum VBFlags {
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VB_HAS_GMC = 0x01,
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VB_HAS_AUDIO = 0x04,
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VB_HAS_VIDEO = 0x08,
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VB_HAS_PALETTE = 0x10,
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VB_HAS_LENGTH = 0x20
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};
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typedef struct SIFFContext {
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int frames;
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int cur_frame;
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int rate;
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int bits;
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int block_align;
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int has_video;
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int has_audio;
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int curstrm;
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unsigned int pktsize;
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int gmcsize;
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unsigned int sndsize;
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unsigned int flags;
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uint8_t gmc[4];
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} SIFFContext;
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static int siff_probe(const AVProbeData *p)
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{
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uint32_t tag = AV_RL32(p->buf + 8);
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/* check file header */
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if (AV_RL32(p->buf) != TAG_SIFF ||
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(tag != TAG_VBV1 && tag != TAG_SOUN))
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
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{
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AVStream *ast;
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ast = avformat_new_stream(s, NULL);
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if (!ast)
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return AVERROR(ENOMEM);
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ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
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ast->codecpar->channels = 1;
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ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
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ast->codecpar->bits_per_coded_sample = 8;
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ast->codecpar->sample_rate = c->rate;
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avpriv_set_pts_info(ast, 16, 1, c->rate);
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ast->start_time = 0;
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return 0;
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}
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static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
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{
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AVStream *st;
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int width, height;
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if (avio_rl32(pb) != TAG_VBHD) {
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av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
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return AVERROR_INVALIDDATA;
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}
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if (avio_rb32(pb) != 32) {
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av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
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return AVERROR_INVALIDDATA;
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}
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if (avio_rl16(pb) != 1) {
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av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
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return AVERROR_INVALIDDATA;
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}
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width = avio_rl16(pb);
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height = avio_rl16(pb);
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avio_skip(pb, 4);
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c->frames = avio_rl16(pb);
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if (!c->frames) {
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av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
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return AVERROR_INVALIDDATA;
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}
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c->bits = avio_rl16(pb);
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c->rate = avio_rl16(pb);
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c->block_align = c->rate * (c->bits >> 3);
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avio_skip(pb, 16); // zeroes
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_VB;
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st->codecpar->codec_tag = MKTAG('V', 'B', 'V', '1');
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st->codecpar->width = width;
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st->codecpar->height = height;
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st->codecpar->format = AV_PIX_FMT_PAL8;
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st->nb_frames =
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st->duration = c->frames;
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avpriv_set_pts_info(st, 16, 1, 12);
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c->cur_frame = 0;
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c->has_video = 1;
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c->has_audio = !!c->rate;
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c->curstrm = -1;
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if (c->has_audio)
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return create_audio_stream(s, c);
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return 0;
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}
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static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
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{
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if (avio_rl32(pb) != TAG_SHDR) {
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av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
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return AVERROR_INVALIDDATA;
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}
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if (avio_rb32(pb) != 8) {
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av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 4); // unknown value
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c->rate = avio_rl16(pb);
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c->bits = avio_rl16(pb);
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c->block_align = c->rate * (c->bits >> 3);
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return create_audio_stream(s, c);
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}
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static int siff_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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SIFFContext *c = s->priv_data;
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uint32_t tag;
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int ret;
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if (avio_rl32(pb) != TAG_SIFF)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4); // ignore size
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tag = avio_rl32(pb);
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if (tag != TAG_VBV1 && tag != TAG_SOUN) {
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av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
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return AVERROR_INVALIDDATA;
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}
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if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
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return ret;
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if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
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return ret;
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if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
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av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 4); // ignore size
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return 0;
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}
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static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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SIFFContext *c = s->priv_data;
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int ret;
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if (c->has_video) {
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unsigned int size;
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if (c->cur_frame >= c->frames)
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return AVERROR_EOF;
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if (c->curstrm == -1) {
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c->pktsize = avio_rl32(s->pb) - 4;
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c->flags = avio_rl16(s->pb);
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c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
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if (c->gmcsize)
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avio_read(s->pb, c->gmc, c->gmcsize);
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c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
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c->curstrm = !!(c->flags & VB_HAS_AUDIO);
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}
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if (!c->curstrm) {
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if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
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return AVERROR_INVALIDDATA;
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size = c->pktsize - c->sndsize - c->gmcsize - 2;
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size = ffio_limit(s->pb, size);
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if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
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return ret;
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AV_WL16(pkt->data, c->flags);
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if (c->gmcsize)
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memcpy(pkt->data + 2, c->gmc, c->gmcsize);
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if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
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av_packet_unref(pkt);
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return AVERROR_INVALIDDATA;
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}
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pkt->stream_index = 0;
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c->curstrm = -1;
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} else {
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int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
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if (pktsize < 0)
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return AVERROR(EIO);
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pkt->stream_index = 1;
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pkt->duration = pktsize;
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c->curstrm = 0;
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}
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if (!c->cur_frame || c->curstrm)
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pkt->flags |= AV_PKT_FLAG_KEY;
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if (c->curstrm == -1)
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c->cur_frame++;
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} else {
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int pktsize = av_get_packet(s->pb, pkt, c->block_align);
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if (!pktsize)
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return AVERROR_EOF;
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if (pktsize <= 0)
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return AVERROR(EIO);
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pkt->duration = pktsize;
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}
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return pkt->size;
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}
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AVInputFormat ff_siff_demuxer = {
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.name = "siff",
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.long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
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.priv_data_size = sizeof(SIFFContext),
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.read_probe = siff_probe,
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.read_header = siff_read_header,
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.read_packet = siff_read_packet,
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.extensions = "vb,son",
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};
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