| /* |
| * PMP demuxer. |
| * Copyright (c) 2011 Reimar Döffinger |
| * |
| * 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 |
| */ |
| |
| #include "libavutil/intreadwrite.h" |
| #include "avformat.h" |
| #include "internal.h" |
| |
| typedef struct { |
| int cur_stream; |
| int num_streams; |
| int audio_packets; |
| int current_packet; |
| uint32_t *packet_sizes; |
| int packet_sizes_alloc; |
| } PMPContext; |
| |
| static int pmp_probe(const AVProbeData *p) { |
| if (AV_RN32(p->buf) == AV_RN32("pmpm") && |
| AV_RL32(p->buf + 4) == 1) |
| return AVPROBE_SCORE_MAX; |
| return 0; |
| } |
| |
| static int pmp_header(AVFormatContext *s) |
| { |
| PMPContext *pmp = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int tb_num, tb_den; |
| uint32_t index_cnt; |
| int audio_codec_id = AV_CODEC_ID_NONE; |
| int srate, channels; |
| unsigned i; |
| uint64_t pos; |
| int64_t fsize = avio_size(pb); |
| |
| AVStream *vst = avformat_new_stream(s, NULL); |
| if (!vst) |
| return AVERROR(ENOMEM); |
| vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
| avio_skip(pb, 8); |
| switch (avio_rl32(pb)) { |
| case 0: |
| vst->codecpar->codec_id = AV_CODEC_ID_MPEG4; |
| break; |
| case 1: |
| vst->codecpar->codec_id = AV_CODEC_ID_H264; |
| break; |
| default: |
| av_log(s, AV_LOG_ERROR, "Unsupported video format\n"); |
| break; |
| } |
| index_cnt = avio_rl32(pb); |
| vst->codecpar->width = avio_rl32(pb); |
| vst->codecpar->height = avio_rl32(pb); |
| |
| tb_num = avio_rl32(pb); |
| tb_den = avio_rl32(pb); |
| avpriv_set_pts_info(vst, 32, tb_num, tb_den); |
| vst->nb_frames = index_cnt; |
| vst->duration = index_cnt; |
| |
| switch (avio_rl32(pb)) { |
| case 0: |
| audio_codec_id = AV_CODEC_ID_MP3; |
| break; |
| case 1: |
| av_log(s, AV_LOG_ERROR, "AAC not yet correctly supported\n"); |
| audio_codec_id = AV_CODEC_ID_AAC; |
| break; |
| default: |
| av_log(s, AV_LOG_ERROR, "Unsupported audio format\n"); |
| break; |
| } |
| pmp->num_streams = avio_rl16(pb) + 1; |
| avio_skip(pb, 10); |
| srate = avio_rl32(pb); |
| channels = avio_rl32(pb) + 1; |
| pos = avio_tell(pb) + 4LL*index_cnt; |
| for (i = 0; i < index_cnt; i++) { |
| uint32_t size = avio_rl32(pb); |
| int flags = size & 1 ? AVINDEX_KEYFRAME : 0; |
| if (avio_feof(pb)) { |
| av_log(s, AV_LOG_FATAL, "Encountered EOF while reading index.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| size >>= 1; |
| if (size < 9 + 4*pmp->num_streams) { |
| av_log(s, AV_LOG_ERROR, "Packet too small\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| av_add_index_entry(vst, pos, i, size, 0, flags); |
| pos += size; |
| if (fsize > 0 && i == 0 && pos > fsize) { |
| av_log(s, AV_LOG_ERROR, "File ends before first packet\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| for (i = 1; i < pmp->num_streams; i++) { |
| AVStream *ast = avformat_new_stream(s, NULL); |
| if (!ast) |
| return AVERROR(ENOMEM); |
| ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| ast->codecpar->codec_id = audio_codec_id; |
| ast->codecpar->channels = channels; |
| ast->codecpar->sample_rate = srate; |
| avpriv_set_pts_info(ast, 32, 1, srate); |
| } |
| return 0; |
| } |
| |
| static int pmp_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| PMPContext *pmp = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int ret = 0; |
| int i; |
| |
| if (avio_feof(pb)) |
| return AVERROR_EOF; |
| if (pmp->cur_stream == 0) { |
| int num_packets; |
| pmp->audio_packets = avio_r8(pb); |
| |
| if (!pmp->audio_packets) { |
| av_log(s, AV_LOG_ERROR, "No audio packets.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| num_packets = (pmp->num_streams - 1) * pmp->audio_packets + 1; |
| avio_skip(pb, 8); |
| pmp->current_packet = 0; |
| av_fast_malloc(&pmp->packet_sizes, |
| &pmp->packet_sizes_alloc, |
| num_packets * sizeof(*pmp->packet_sizes)); |
| if (!pmp->packet_sizes_alloc) { |
| av_log(s, AV_LOG_ERROR, "Cannot (re)allocate packet buffer\n"); |
| return AVERROR(ENOMEM); |
| } |
| for (i = 0; i < num_packets; i++) |
| pmp->packet_sizes[i] = avio_rl32(pb); |
| } |
| ret = av_get_packet(pb, pkt, pmp->packet_sizes[pmp->current_packet]); |
| if (ret >= 0) { |
| ret = 0; |
| pkt->stream_index = pmp->cur_stream; |
| } |
| if (pmp->current_packet % pmp->audio_packets == 0) |
| pmp->cur_stream = (pmp->cur_stream + 1) % pmp->num_streams; |
| pmp->current_packet++; |
| return ret; |
| } |
| |
| static int pmp_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags) |
| { |
| PMPContext *pmp = s->priv_data; |
| pmp->cur_stream = 0; |
| // fall back on default seek now |
| return -1; |
| } |
| |
| static int pmp_close(AVFormatContext *s) |
| { |
| PMPContext *pmp = s->priv_data; |
| av_freep(&pmp->packet_sizes); |
| return 0; |
| } |
| |
| AVInputFormat ff_pmp_demuxer = { |
| .name = "pmp", |
| .long_name = NULL_IF_CONFIG_SMALL("Playstation Portable PMP"), |
| .priv_data_size = sizeof(PMPContext), |
| .read_probe = pmp_probe, |
| .read_header = pmp_header, |
| .read_packet = pmp_packet, |
| .read_seek = pmp_seek, |
| .read_close = pmp_close, |
| }; |