| /* | |
| * ARMovie/RPL demuxer | |
| * Copyright (c) 2007 Christian Ohm, 2008 Eli Friedman | |
| * | |
| * 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 <inttypes.h> | |
| #include <stdlib.h> | |
| #include "libavutil/avstring.h" | |
| #include "libavutil/dict.h" | |
| #include "avformat.h" | |
| #include "demux.h" | |
| #include "internal.h" | |
| #define RPL_SIGNATURE "ARMovie\x0A" | |
| #define RPL_SIGNATURE_SIZE 8 | |
| /** 256 is arbitrary, but should be big enough for any reasonable file. */ | |
| #define RPL_LINE_LENGTH 256 | |
| static int rpl_probe(const AVProbeData *p) | |
| { | |
| if (memcmp(p->buf, RPL_SIGNATURE, RPL_SIGNATURE_SIZE)) | |
| return 0; | |
| return AVPROBE_SCORE_MAX; | |
| } | |
| typedef struct RPLContext { | |
| // RPL header data | |
| int32_t frames_per_chunk; | |
| // Stream position data | |
| uint32_t chunk_number; | |
| uint32_t chunk_part; | |
| uint32_t frame_in_part; | |
| } RPLContext; | |
| static int read_line(AVIOContext * pb, char* line, int bufsize) | |
| { | |
| int i; | |
| for (i = 0; i < bufsize - 1; i++) { | |
| int b = avio_r8(pb); | |
| if (b == 0) | |
| break; | |
| if (b == '\n') { | |
| line[i] = '\0'; | |
| return avio_feof(pb) ? -1 : 0; | |
| } | |
| line[i] = b; | |
| } | |
| line[i] = '\0'; | |
| return -1; | |
| } | |
| static int32_t read_int(const char* line, const char** endptr, int* error) | |
| { | |
| unsigned long result = 0; | |
| for (; *line>='0' && *line<='9'; line++) { | |
| if (result > (0x7FFFFFFF - 9) / 10) | |
| *error = -1; | |
| result = 10 * result + *line - '0'; | |
| } | |
| *endptr = line; | |
| return result; | |
| } | |
| static int32_t read_line_and_int(AVIOContext * pb, int* error) | |
| { | |
| char line[RPL_LINE_LENGTH]; | |
| const char *endptr; | |
| *error |= read_line(pb, line, sizeof(line)); | |
| return read_int(line, &endptr, error); | |
| } | |
| /** Parsing for fps, which can be a fraction. Unfortunately, | |
| * the spec for the header leaves out a lot of details, | |
| * so this is mostly guessing. | |
| */ | |
| static AVRational read_fps(const char* line, int* error) | |
| { | |
| int64_t num, den = 1; | |
| AVRational result; | |
| num = read_int(line, &line, error); | |
| if (*line == '.') | |
| line++; | |
| for (; *line>='0' && *line<='9'; line++) { | |
| // Truncate any numerator too large to fit into an int64_t | |
| if (num > (INT64_MAX - 9) / 10ULL || den > INT64_MAX / 10ULL) | |
| break; | |
| num = 10 * num + (*line - '0'); | |
| den *= 10; | |
| } | |
| if (!num) | |
| *error = -1; | |
| av_reduce(&result.num, &result.den, num, den, 0x7FFFFFFF); | |
| return result; | |
| } | |
| static int rpl_read_header(AVFormatContext *s) | |
| { | |
| AVIOContext *pb = s->pb; | |
| RPLContext *rpl = s->priv_data; | |
| AVStream *vst = NULL, *ast = NULL; | |
| int64_t total_audio_size; | |
| int error = 0; | |
| const char *endptr; | |
| char audio_type[RPL_LINE_LENGTH]; | |
| char audio_codec[RPL_LINE_LENGTH]; | |
| uint32_t i; | |
| int32_t video_format, audio_format, chunk_catalog_offset, number_of_chunks; | |
| AVRational fps; | |
| char line[RPL_LINE_LENGTH]; | |
| // The header for RPL/ARMovie files is 21 lines of text | |
| // containing the various header fields. The fields are always | |
| // in the same order, and other text besides the first | |
| // number usually isn't important. | |
| // (The spec says that there exists some significance | |
| // for the text in a few cases; samples needed.) | |
| error |= read_line(pb, line, sizeof(line)); // ARMovie | |
| error |= read_line(pb, line, sizeof(line)); // movie name | |
| av_dict_set(&s->metadata, "title" , line, 0); | |
| error |= read_line(pb, line, sizeof(line)); // date/copyright | |
| av_dict_set(&s->metadata, "copyright", line, 0); | |
| error |= read_line(pb, line, sizeof(line)); // author and other | |
| av_dict_set(&s->metadata, "author" , line, 0); | |
| // video headers | |
| video_format = read_line_and_int(pb, &error); | |
| if (video_format) { | |
| vst = avformat_new_stream(s, NULL); | |
| if (!vst) | |
| return AVERROR(ENOMEM); | |
| vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| vst->codecpar->codec_tag = video_format; | |
| vst->codecpar->width = read_line_and_int(pb, &error); // video width | |
| vst->codecpar->height = read_line_and_int(pb, &error); // video height | |
| vst->codecpar->bits_per_coded_sample = read_line_and_int(pb, &error); // video bits per sample | |
| // Figure out the video codec | |
| switch (vst->codecpar->codec_tag) { | |
| #if 0 | |
| case 122: | |
| vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE122; | |
| break; | |
| #endif | |
| case 124: | |
| vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE124; | |
| // The header is wrong here, at least sometimes | |
| vst->codecpar->bits_per_coded_sample = 16; | |
| break; | |
| case 130: | |
| vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE130; | |
| break; | |
| default: | |
| avpriv_report_missing_feature(s, "Video format %s", | |
| av_fourcc2str(vst->codecpar->codec_tag)); | |
| vst->codecpar->codec_id = AV_CODEC_ID_NONE; | |
| } | |
| } else { | |
| for (i = 0; i < 3; i++) | |
| error |= read_line(pb, line, sizeof(line)); | |
| } | |
| error |= read_line(pb, line, sizeof(line)); // video frames per second | |
| fps = read_fps(line, &error); | |
| if (vst) | |
| avpriv_set_pts_info(vst, 32, fps.den, fps.num); | |
| // Audio headers | |
| // ARMovie supports multiple audio tracks; I don't have any | |
| // samples, though. This code will ignore additional tracks. | |
| error |= read_line(pb, line, sizeof(line)); | |
| audio_format = read_int(line, &endptr, &error); // audio format ID | |
| av_strlcpy(audio_codec, endptr, RPL_LINE_LENGTH); | |
| if (audio_format) { | |
| int channels; | |
| ast = avformat_new_stream(s, NULL); | |
| if (!ast) | |
| return AVERROR(ENOMEM); | |
| ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| ast->codecpar->codec_tag = audio_format; | |
| ast->codecpar->sample_rate = read_line_and_int(pb, &error); // audio bitrate | |
| channels = read_line_and_int(pb, &error); // number of audio channels | |
| if (channels <= 0) | |
| return AVERROR_INVALIDDATA; | |
| error |= read_line(pb, line, sizeof(line)); | |
| ast->codecpar->bits_per_coded_sample = read_int(line, &endptr, &error); // audio bits per sample | |
| av_strlcpy(audio_type, endptr, RPL_LINE_LENGTH); | |
| ast->codecpar->ch_layout.nb_channels = channels; | |
| // At least one sample uses 0 for ADPCM, which is really 4 bits | |
| // per sample. | |
| if (ast->codecpar->bits_per_coded_sample == 0) | |
| ast->codecpar->bits_per_coded_sample = 4; | |
| ast->codecpar->bit_rate = ast->codecpar->sample_rate * | |
| (int64_t)ast->codecpar->ch_layout.nb_channels; | |
| if (ast->codecpar->bit_rate > INT64_MAX / ast->codecpar->bits_per_coded_sample) | |
| return AVERROR_INVALIDDATA; | |
| ast->codecpar->bit_rate *= ast->codecpar->bits_per_coded_sample; | |
| ast->codecpar->codec_id = AV_CODEC_ID_NONE; | |
| switch (audio_format) { | |
| case 1: | |
| if (ast->codecpar->bits_per_coded_sample == 16) { | |
| // 16-bit audio is always signed | |
| ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; | |
| } else if (ast->codecpar->bits_per_coded_sample == 8) { | |
| if (av_stristr(audio_type, "unsigned") != NULL) | |
| ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8; | |
| else if (av_stristr(audio_type, "linear") != NULL) | |
| ast->codecpar->codec_id = AV_CODEC_ID_PCM_S8; | |
| else | |
| ast->codecpar->codec_id = AV_CODEC_ID_PCM_VIDC; | |
| } | |
| // There are some other formats listed as legal per the spec; | |
| // samples needed. | |
| break; | |
| case 2: | |
| if (av_stristr(audio_codec, "adpcm") != NULL) { | |
| ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_ACORN; | |
| } | |
| break; | |
| case 101: | |
| if (ast->codecpar->bits_per_coded_sample == 8) { | |
| // The samples with this kind of audio that I have | |
| // are all unsigned. | |
| ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8; | |
| } else if (ast->codecpar->bits_per_coded_sample == 4) { | |
| ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_EA_SEAD; | |
| } | |
| break; | |
| } | |
| if (ast->codecpar->codec_id == AV_CODEC_ID_NONE) | |
| avpriv_request_sample(s, "Audio format %"PRId32" (%s)", | |
| audio_format, audio_codec); | |
| avpriv_set_pts_info(ast, 32, 1, ast->codecpar->bit_rate); | |
| } else { | |
| for (i = 0; i < 3; i++) | |
| error |= read_line(pb, line, sizeof(line)); | |
| } | |
| if (s->nb_streams == 0) | |
| return AVERROR_INVALIDDATA; | |
| rpl->frames_per_chunk = read_line_and_int(pb, &error); // video frames per chunk | |
| if (vst && rpl->frames_per_chunk > 1 && vst->codecpar->codec_tag != 124) | |
| av_log(s, AV_LOG_WARNING, | |
| "Don't know how to split frames for video format %s. " | |
| "Video stream will be broken!\n", av_fourcc2str(vst->codecpar->codec_tag)); | |
| number_of_chunks = read_line_and_int(pb, &error); // number of chunks in the file | |
| if (number_of_chunks == INT_MAX) | |
| return AVERROR_INVALIDDATA; | |
| // The number in the header is actually the index of the last chunk. | |
| number_of_chunks++; | |
| error |= read_line(pb, line, sizeof(line)); // "even" chunk size in bytes | |
| error |= read_line(pb, line, sizeof(line)); // "odd" chunk size in bytes | |
| chunk_catalog_offset = // offset of the "chunk catalog" | |
| read_line_and_int(pb, &error); // (file index) | |
| error |= read_line(pb, line, sizeof(line)); // offset to "helpful" sprite | |
| error |= read_line(pb, line, sizeof(line)); // size of "helpful" sprite | |
| if (vst) { | |
| error |= read_line(pb, line, sizeof(line)); // offset to key frame list | |
| vst->duration = number_of_chunks * (int64_t)rpl->frames_per_chunk; | |
| } | |
| // Read the index | |
| avio_seek(pb, chunk_catalog_offset, SEEK_SET); | |
| total_audio_size = 0; | |
| for (i = 0; !error && i < number_of_chunks; i++) { | |
| int64_t offset, video_size, audio_size; | |
| error |= read_line(pb, line, sizeof(line)); | |
| if (3 != sscanf(line, "%"SCNd64" , %"SCNd64" ; %"SCNd64, | |
| &offset, &video_size, &audio_size)) { | |
| error = -1; | |
| continue; | |
| } | |
| if (vst) | |
| av_add_index_entry(vst, offset, i * rpl->frames_per_chunk, | |
| video_size, rpl->frames_per_chunk, 0); | |
| if (ast) | |
| av_add_index_entry(ast, offset + video_size, total_audio_size, | |
| audio_size, audio_size * 8, 0); | |
| if (total_audio_size/8 + (uint64_t)audio_size >= INT64_MAX/8) | |
| return AVERROR_INVALIDDATA; | |
| total_audio_size += audio_size * 8; | |
| } | |
| if (error) | |
| return AVERROR(EIO); | |
| return 0; | |
| } | |
| static int rpl_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| { | |
| RPLContext *rpl = s->priv_data; | |
| AVIOContext *pb = s->pb; | |
| AVStream* stream; | |
| FFStream *sti; | |
| AVIndexEntry* index_entry; | |
| int ret; | |
| if (rpl->chunk_part == s->nb_streams) { | |
| rpl->chunk_number++; | |
| rpl->chunk_part = 0; | |
| } | |
| stream = s->streams[rpl->chunk_part]; | |
| sti = ffstream(stream); | |
| if (rpl->chunk_number >= sti->nb_index_entries) | |
| return AVERROR_EOF; | |
| index_entry = &sti->index_entries[rpl->chunk_number]; | |
| if (rpl->frame_in_part == 0) { | |
| if (avio_seek(pb, index_entry->pos, SEEK_SET) < 0) | |
| return AVERROR(EIO); | |
| } | |
| if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && | |
| stream->codecpar->codec_tag == 124) { | |
| // We have to split Escape 124 frames because there are | |
| // multiple frames per chunk in Escape 124 samples. | |
| uint32_t frame_size; | |
| avio_skip(pb, 4); /* flags */ | |
| frame_size = avio_rl32(pb); | |
| if (avio_feof(pb) || avio_seek(pb, -8, SEEK_CUR) < 0 || !frame_size) | |
| return AVERROR(EIO); | |
| ret = av_get_packet(pb, pkt, frame_size); | |
| if (ret < 0) | |
| return ret; | |
| if (ret != frame_size) | |
| return AVERROR(EIO); | |
| pkt->duration = 1; | |
| pkt->pts = index_entry->timestamp + rpl->frame_in_part; | |
| pkt->stream_index = rpl->chunk_part; | |
| rpl->frame_in_part++; | |
| if (rpl->frame_in_part == rpl->frames_per_chunk) { | |
| rpl->frame_in_part = 0; | |
| rpl->chunk_part++; | |
| } | |
| } else { | |
| ret = av_get_packet(pb, pkt, index_entry->size); | |
| if (ret < 0) | |
| return ret; | |
| if (ret != index_entry->size) | |
| return AVERROR(EIO); | |
| if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { | |
| // frames_per_chunk should always be one here; the header | |
| // parsing will warn if it isn't. | |
| pkt->duration = rpl->frames_per_chunk; | |
| } else { | |
| // All the audio codecs supported in this container | |
| // (at least so far) are constant-bitrate. | |
| pkt->duration = ret * 8; | |
| } | |
| pkt->pts = index_entry->timestamp; | |
| pkt->stream_index = rpl->chunk_part; | |
| rpl->chunk_part++; | |
| } | |
| // None of the Escape formats have keyframes, and the ADPCM | |
| // format used doesn't have keyframes. | |
| if (rpl->chunk_number == 0 && rpl->frame_in_part == 0) | |
| pkt->flags |= AV_PKT_FLAG_KEY; | |
| return ret; | |
| } | |
| const FFInputFormat ff_rpl_demuxer = { | |
| .p.name = "rpl", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("RPL / ARMovie"), | |
| .priv_data_size = sizeof(RPLContext), | |
| .read_probe = rpl_probe, | |
| .read_header = rpl_read_header, | |
| .read_packet = rpl_read_packet, | |
| }; |