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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
198 lines
5.9 KiB
C
198 lines
5.9 KiB
C
/*
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* PMP demuxer.
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* Copyright (c) 2011 Reimar Döffinger
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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/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "avformat.h"
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#include "demux.h"
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#include "internal.h"
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typedef struct {
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int cur_stream;
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int num_streams;
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int audio_packets;
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int current_packet;
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uint32_t *packet_sizes;
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int packet_sizes_alloc;
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} PMPContext;
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static int pmp_probe(const AVProbeData *p) {
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if (AV_RN32(p->buf) == AV_RN32("pmpm") &&
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AV_RL32(p->buf + 4) == 1)
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int pmp_header(AVFormatContext *s)
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{
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PMPContext *pmp = s->priv_data;
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AVIOContext *pb = s->pb;
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int tb_num, tb_den;
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uint32_t index_cnt;
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int audio_codec_id = AV_CODEC_ID_NONE;
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int srate, channels;
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unsigned i;
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uint64_t pos;
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int64_t fsize = avio_size(pb);
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AVStream *vst = avformat_new_stream(s, NULL);
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if (!vst)
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return AVERROR(ENOMEM);
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vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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avio_skip(pb, 8);
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switch (avio_rl32(pb)) {
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case 0:
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vst->codecpar->codec_id = AV_CODEC_ID_MPEG4;
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break;
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case 1:
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vst->codecpar->codec_id = AV_CODEC_ID_H264;
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break;
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default:
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av_log(s, AV_LOG_ERROR, "Unsupported video format\n");
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break;
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}
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index_cnt = avio_rl32(pb);
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vst->codecpar->width = avio_rl32(pb);
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vst->codecpar->height = avio_rl32(pb);
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tb_num = avio_rl32(pb);
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tb_den = avio_rl32(pb);
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avpriv_set_pts_info(vst, 32, tb_num, tb_den);
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vst->nb_frames = index_cnt;
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vst->duration = index_cnt;
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switch (avio_rl32(pb)) {
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case 0:
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audio_codec_id = AV_CODEC_ID_MP3;
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break;
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case 1:
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av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n");
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audio_codec_id = AV_CODEC_ID_AAC;
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break;
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default:
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av_log(s, AV_LOG_ERROR, "Unsupported audio format\n");
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break;
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}
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pmp->num_streams = avio_rl16(pb) + 1;
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avio_skip(pb, 10);
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srate = avio_rl32(pb);
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channels = avio_rl32(pb) + 1;
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pos = avio_tell(pb) + 4LL*index_cnt;
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for (i = 0; i < index_cnt; i++) {
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uint32_t size = avio_rl32(pb);
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int flags = size & 1 ? AVINDEX_KEYFRAME : 0;
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if (avio_feof(pb)) {
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av_log(s, AV_LOG_FATAL, "Encountered EOF while reading index.\n");
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return AVERROR_INVALIDDATA;
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}
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size >>= 1;
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if (size < 9 + 4*pmp->num_streams) {
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av_log(s, AV_LOG_ERROR, "Packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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av_add_index_entry(vst, pos, i, size, 0, flags);
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pos += size;
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if (fsize > 0 && i == 0 && pos > fsize) {
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av_log(s, AV_LOG_ERROR, "File ends before first packet\n");
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return AVERROR_INVALIDDATA;
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}
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}
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for (i = 1; i < pmp->num_streams; i++) {
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AVStream *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 = audio_codec_id;
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ast->codecpar->ch_layout.nb_channels = channels;
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ast->codecpar->sample_rate = srate;
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avpriv_set_pts_info(ast, 32, 1, srate);
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}
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return 0;
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}
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static int pmp_packet(AVFormatContext *s, AVPacket *pkt)
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{
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PMPContext *pmp = s->priv_data;
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AVIOContext *pb = s->pb;
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int ret = 0;
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int i;
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if (avio_feof(pb))
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return AVERROR_EOF;
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if (pmp->cur_stream == 0) {
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int num_packets;
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pmp->audio_packets = avio_r8(pb);
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if (!pmp->audio_packets) {
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av_log(s, AV_LOG_ERROR, "No audio packets.\n");
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return AVERROR_INVALIDDATA;
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}
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num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1;
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avio_skip(pb, 8);
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pmp->current_packet = 0;
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av_fast_malloc(&pmp->packet_sizes,
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&pmp->packet_sizes_alloc,
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num_packets * sizeof(*pmp->packet_sizes));
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if (!pmp->packet_sizes_alloc) {
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av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n");
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < num_packets; i++)
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pmp->packet_sizes[i] = avio_rl32(pb);
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}
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ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]);
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if (ret >= 0) {
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ret = 0;
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pkt->stream_index = pmp->cur_stream;
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}
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if (pmp->current_packet % pmp->audio_packets == 0)
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pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams;
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pmp->current_packet++;
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return ret;
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}
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static int pmp_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
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{
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PMPContext *pmp = s->priv_data;
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pmp->cur_stream = 0;
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// fall back on default seek now
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return -1;
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}
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static int pmp_close(AVFormatContext *s)
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{
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PMPContext *pmp = s->priv_data;
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av_freep(&pmp->packet_sizes);
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return 0;
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}
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const FFInputFormat ff_pmp_demuxer = {
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.p.name = "pmp",
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.p.long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP"),
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.priv_data_size = sizeof(PMPContext),
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.read_probe = pmp_probe,
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.read_header = pmp_header,
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.read_packet = pmp_packet,
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.read_seek = pmp_seek,
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.read_close = pmp_close,
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};
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