mirror of https://git.ffmpeg.org/ffmpeg.git
471 lines
16 KiB
C
471 lines
16 KiB
C
/*
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* Magic Lantern Video (MLV) demuxer
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* Copyright (c) 2014 Peter Ross
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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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/**
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* @file
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* Magic Lantern Video (MLV) demuxer
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*/
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#include "libavutil/eval.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/rational.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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#include "riff.h"
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#define MLV_VERSION "v2.0"
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#define MLV_VIDEO_CLASS_RAW 1
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#define MLV_VIDEO_CLASS_YUV 2
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#define MLV_VIDEO_CLASS_JPEG 3
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#define MLV_VIDEO_CLASS_H264 4
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#define MLV_AUDIO_CLASS_WAV 1
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#define MLV_CLASS_FLAG_DELTA 0x40
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#define MLV_CLASS_FLAG_LZMA 0x80
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typedef struct {
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AVIOContext *pb[101];
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int class[2];
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int stream_index;
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uint64_t pts;
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} MlvContext;
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static int probe(AVProbeData *p)
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{
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if (AV_RL32(p->buf) == MKTAG('M','L','V','I') &&
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AV_RL32(p->buf + 4) >= 52 &&
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!memcmp(p->buf + 8, MLV_VERSION, 5))
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int check_file_header(AVIOContext *pb, uint64_t guid)
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{
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unsigned int size;
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uint8_t version[8];
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avio_skip(pb, 4);
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size = avio_rl32(pb);
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if (size < 52)
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return AVERROR_INVALIDDATA;
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avio_read(pb, version, 8);
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if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, size - 24);
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return 0;
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}
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static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, int size)
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{
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char * value = av_malloc(size + 1);
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if (!value) {
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avio_skip(pb, size);
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return;
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}
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avio_read(pb, value, size);
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if (!value[0]) {
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av_free(value);
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return;
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}
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value[size] = 0;
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av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
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}
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static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
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{
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av_dict_set_int(&avctx->metadata, tag, avio_r8(pb), 0);
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}
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static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
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{
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av_dict_set_int(&avctx->metadata, tag, avio_rl16(pb), 0);
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}
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static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
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{
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av_dict_set_int(&avctx->metadata, tag, avio_rl32(pb), 0);
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}
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static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
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{
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av_dict_set_int(&avctx->metadata, tag, avio_rl64(pb), 0);
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}
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static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
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{
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MlvContext *mlv = avctx->priv_data;
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AVIOContext *pb = mlv->pb[file];
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int ret;
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while (!avio_feof(pb)) {
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int type;
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unsigned int size;
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type = avio_rl32(pb);
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size = avio_rl32(pb);
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avio_skip(pb, 8); //timestamp
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if (size < 16)
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break;
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size -= 16;
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if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
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vst->codec->width = avio_rl16(pb);
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vst->codec->height = avio_rl16(pb);
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if (avio_rl32(pb) != 1)
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avpriv_request_sample(avctx, "raw api version");
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avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
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vst->codec->bits_per_coded_sample = avio_rl32(pb);
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avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias
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if (avio_rl32(pb) != 0x2010100) /* RGGB */
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avpriv_request_sample(avctx, "cfa_pattern");
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avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range
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vst->codec->pix_fmt = AV_PIX_FMT_BAYER_RGGB16LE;
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vst->codec->codec_tag = MKTAG('B', 'I', 'T', 16);
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size -= 164;
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} else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
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ret = ff_get_wav_header(avctx, pb, ast->codec, 16, 0);
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if (ret < 0)
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return ret;
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size -= 16;
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} else if (type == MKTAG('I','N','F','O')) {
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if (size > 0)
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read_string(avctx, pb, "info", size);
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continue;
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} else if (type == MKTAG('I','D','N','T') && size >= 36) {
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read_string(avctx, pb, "cameraName", 32);
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read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
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size -= 36;
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if (size >= 32) {
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read_string(avctx, pb, "cameraSerial", 32);
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size -= 32;
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}
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} else if (type == MKTAG('L','E','N','S') && size >= 48) {
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read_uint16(avctx, pb, "focalLength", "%i");
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read_uint16(avctx, pb, "focalDist", "%i");
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read_uint16(avctx, pb, "aperture", "%i");
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read_uint8(avctx, pb, "stabilizerMode", "%i");
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read_uint8(avctx, pb, "autofocusMode", "%i");
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read_uint32(avctx, pb, "flags", "0x%"PRIx32);
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read_uint32(avctx, pb, "lensID", "%"PRIi32);
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read_string(avctx, pb, "lensName", 32);
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size -= 48;
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if (size >= 32) {
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read_string(avctx, pb, "lensSerial", 32);
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size -= 32;
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}
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} else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
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uint64_t pts = avio_rl32(pb);
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ff_add_index_entry(&vst->index_entries, &vst->nb_index_entries, &vst->index_entries_allocated_size,
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avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
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size -= 4;
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} else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
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uint64_t pts = avio_rl32(pb);
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ff_add_index_entry(&ast->index_entries, &ast->nb_index_entries, &ast->index_entries_allocated_size,
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avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
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size -= 4;
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} else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
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read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
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read_uint32(avctx, pb, "kelvin", "%"PRIi32);
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read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
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read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
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read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
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read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
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read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
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size -= 28;
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} else if (type == MKTAG('R','T','C','I') && size >= 20) {
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char str[32];
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struct tm time = { 0 };
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time.tm_sec = avio_rl16(pb);
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time.tm_min = avio_rl16(pb);
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time.tm_hour = avio_rl16(pb);
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time.tm_mday = avio_rl16(pb);
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time.tm_mon = avio_rl16(pb);
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time.tm_year = avio_rl16(pb);
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time.tm_wday = avio_rl16(pb);
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time.tm_yday = avio_rl16(pb);
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time.tm_isdst = avio_rl16(pb);
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avio_skip(pb, 2);
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if (strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time))
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av_dict_set(&avctx->metadata, "time", str, 0);
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size -= 20;
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} else if (type == MKTAG('E','X','P','O') && size >= 16) {
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av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
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read_uint32(avctx, pb, "isoValue", "%"PRIi32);
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read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
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read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
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size -= 16;
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if (size >= 8) {
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read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
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size -= 8;
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}
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} else if (type == MKTAG('S','T','Y','L') && size >= 36) {
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read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
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read_uint32(avctx, pb, "contrast", "%"PRIi32);
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read_uint32(avctx, pb, "sharpness", "%"PRIi32);
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read_uint32(avctx, pb, "saturation", "%"PRIi32);
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read_uint32(avctx, pb, "colortone", "%"PRIi32);
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read_string(avctx, pb, "picStyleName", 16);
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size -= 36;
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} else if (type == MKTAG('M','A','R','K')) {
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} else if (type == MKTAG('N','U','L','L')) {
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} else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
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} else {
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av_log(avctx, AV_LOG_INFO, "unsupported tag %c%c%c%c, size %u\n", type&0xFF, (type>>8)&0xFF, (type>>16)&0xFF, (type>>24)&0xFF, size);
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}
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avio_skip(pb, size);
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}
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return 0;
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}
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static int read_header(AVFormatContext *avctx)
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{
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MlvContext *mlv = avctx->priv_data;
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AVIOContext *pb = avctx->pb;
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AVStream *vst = NULL, *ast = NULL;
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int size, ret;
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unsigned nb_video_frames, nb_audio_frames;
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uint64_t guid;
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char guidstr[32];
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avio_skip(pb, 4);
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size = avio_rl32(pb);
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if (size < 52)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 8);
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guid = avio_rl64(pb);
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snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
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av_dict_set(&avctx->metadata, "guid", guidstr, 0);
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avio_skip(pb, 8); //fileNum, fileCount, fileFlags
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mlv->class[0] = avio_rl16(pb);
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mlv->class[1] = avio_rl16(pb);
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nb_video_frames = avio_rl32(pb);
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nb_audio_frames = avio_rl32(pb);
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if (nb_video_frames && mlv->class[0]) {
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vst = avformat_new_stream(avctx, NULL);
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if (!vst)
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return AVERROR(ENOMEM);
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vst->id = 0;
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vst->nb_frames = nb_video_frames;
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if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)))
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avpriv_request_sample(avctx, "compression");
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vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
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case MLV_VIDEO_CLASS_RAW:
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vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
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break;
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case MLV_VIDEO_CLASS_YUV:
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vst->codec->pix_fmt = AV_PIX_FMT_YUV420P;
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vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
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vst->codec->codec_tag = 0;
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break;
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case MLV_VIDEO_CLASS_JPEG:
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vst->codec->codec_id = AV_CODEC_ID_MJPEG;
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vst->codec->codec_tag = 0;
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break;
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case MLV_VIDEO_CLASS_H264:
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vst->codec->codec_id = AV_CODEC_ID_H264;
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vst->codec->codec_tag = 0;
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break;
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default:
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avpriv_request_sample(avctx, "unknown video class");
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}
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}
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if (nb_audio_frames && mlv->class[1]) {
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ast = avformat_new_stream(avctx, NULL);
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if (!ast)
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return AVERROR(ENOMEM);
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ast->id = 1;
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ast->nb_frames = nb_audio_frames;
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if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
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avpriv_request_sample(avctx, "compression");
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if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
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avpriv_request_sample(avctx, "unknown audio class");
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ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate);
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}
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if (vst) {
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AVRational framerate;
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framerate.num = avio_rl32(pb);
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framerate.den = avio_rl32(pb);
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avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
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} else
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avio_skip(pb, 8);
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avio_skip(pb, size - 52);
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/* scan primary file */
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mlv->pb[100] = avctx->pb;
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ret = scan_file(avctx, vst, ast, 100);
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if (ret < 0)
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return ret;
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/* scan secondary files */
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if (strlen(avctx->filename) > 2) {
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int i;
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char *filename = av_strdup(avctx->filename);
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AVOpenCallback open_func = avctx->open_cb;
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if (!filename)
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return AVERROR(ENOMEM);
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if (!open_func)
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open_func = ffio_open2_wrapper;
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for (i = 0; i < 100; i++) {
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snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
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if (open_func(avctx, &mlv->pb[i], filename, AVIO_FLAG_READ, &avctx->interrupt_callback, NULL) < 0)
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break;
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if (check_file_header(mlv->pb[i], guid) < 0) {
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av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
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avio_closep(&mlv->pb[i]);
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continue;
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}
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av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
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ret = scan_file(avctx, vst, ast, i);
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if (ret < 0) {
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av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
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avio_closep(&mlv->pb[i]);
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continue;
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}
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}
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av_free(filename);
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}
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if (vst)
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vst->duration = vst->nb_index_entries;
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if (ast)
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ast->duration = ast->nb_index_entries;
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if ((vst && !vst->nb_index_entries) || (ast && !ast->nb_index_entries)) {
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av_log(avctx, AV_LOG_ERROR, "no index entries found\n");
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return AVERROR_INVALIDDATA;
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}
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if (vst && ast)
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avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET);
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else if (vst)
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avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
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else if (ast)
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avio_seek(pb, ast->index_entries[0].pos, SEEK_SET);
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return 0;
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}
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static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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MlvContext *mlv = avctx->priv_data;
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AVIOContext *pb;
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AVStream *st = avctx->streams[mlv->stream_index];
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int index, ret;
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unsigned int size, space;
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if (mlv->pts >= st->duration)
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return AVERROR_EOF;
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index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY);
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if (index < 0) {
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av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
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return AVERROR(EIO);
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}
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pb = mlv->pb[st->index_entries[index].size];
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avio_seek(pb, st->index_entries[index].pos, SEEK_SET);
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avio_skip(pb, 4); // blockType
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size = avio_rl32(pb);
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if (size < 16)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 12); //timestamp, frameNumber
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if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
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avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
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space = avio_rl32(pb);
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avio_skip(pb, space);
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if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
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ret = AVERROR_PATCHWELCOME;
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} else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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ret = av_get_packet(pb, pkt, (st->codec->width * st->codec->height * st->codec->bits_per_coded_sample + 7) >> 3);
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} else { // AVMEDIA_TYPE_AUDIO
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if (space > UINT_MAX - 24 || size < (24 + space))
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return AVERROR_INVALIDDATA;
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ret = av_get_packet(pb, pkt, size - (24 + space));
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}
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if (ret < 0)
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return ret;
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pkt->stream_index = mlv->stream_index;
|
|
pkt->pts = mlv->pts;
|
|
|
|
mlv->stream_index++;
|
|
if (mlv->stream_index == avctx->nb_streams) {
|
|
mlv->stream_index = 0;
|
|
mlv->pts++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
MlvContext *mlv = avctx->priv_data;
|
|
|
|
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
|
|
return AVERROR(ENOSYS);
|
|
|
|
if (!avctx->pb->seekable)
|
|
return AVERROR(EIO);
|
|
|
|
mlv->pts = timestamp;
|
|
return 0;
|
|
}
|
|
|
|
static int read_close(AVFormatContext *s)
|
|
{
|
|
MlvContext *mlv = s->priv_data;
|
|
int i;
|
|
for (i = 0; i < 100; i++)
|
|
if (mlv->pb[i])
|
|
avio_closep(&mlv->pb[i]);
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_mlv_demuxer = {
|
|
.name = "mlv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
|
|
.priv_data_size = sizeof(MlvContext),
|
|
.read_probe = probe,
|
|
.read_header = read_header,
|
|
.read_packet = read_packet,
|
|
.read_close = read_close,
|
|
.read_seek = read_seek,
|
|
};
|