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Diffstat (limited to '')
-rw-r--r-- | src/decoder/FfmpegDecoderPlugin.cxx | 718 |
1 files changed, 0 insertions, 718 deletions
diff --git a/src/decoder/FfmpegDecoderPlugin.cxx b/src/decoder/FfmpegDecoderPlugin.cxx deleted file mode 100644 index 5133f91ac..000000000 --- a/src/decoder/FfmpegDecoderPlugin.cxx +++ /dev/null @@ -1,718 +0,0 @@ -/* - * Copyright (C) 2003-2013 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/* necessary because libavutil/common.h uses UINT64_C */ -#define __STDC_CONSTANT_MACROS - -#include "config.h" -#include "FfmpegDecoderPlugin.hxx" -#include "DecoderAPI.hxx" -#include "FfmpegMetaData.hxx" -#include "tag/TagHandler.hxx" -#include "InputStream.hxx" -#include "CheckAudioFormat.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "LogV.hxx" - -extern "C" { -#include <libavcodec/avcodec.h> -#include <libavformat/avformat.h> -#include <libavformat/avio.h> -#include <libavutil/avutil.h> -#include <libavutil/log.h> -#include <libavutil/mathematics.h> - -#if LIBAVUTIL_VERSION_MAJOR >= 53 -#include <libavutil/frame.h> -#endif -} - -#include <assert.h> -#include <string.h> - -static constexpr Domain ffmpeg_domain("ffmpeg"); - -/* suppress the ffmpeg compatibility macro */ -#ifdef SampleFormat -#undef SampleFormat -#endif - -static LogLevel -import_ffmpeg_level(int level) -{ - if (level <= AV_LOG_FATAL) - return LogLevel::ERROR; - - if (level <= AV_LOG_WARNING) - return LogLevel::WARNING; - - if (level <= AV_LOG_INFO) - return LogLevel::INFO; - - return LogLevel::DEBUG; -} - -static void -mpd_ffmpeg_log_callback(gcc_unused void *ptr, int level, - const char *fmt, va_list vl) -{ - const AVClass * cls = nullptr; - - if (ptr != nullptr) - cls = *(const AVClass *const*)ptr; - - if (cls != nullptr) { - char domain[64]; - snprintf(domain, sizeof(domain), "%s/%s", - ffmpeg_domain.GetName(), cls->item_name(ptr)); - const Domain d(domain); - LogFormatV(d, import_ffmpeg_level(level), fmt, vl); - } -} - -struct AvioStream { - Decoder *const decoder; - InputStream &input; - - AVIOContext *io; - - unsigned char buffer[8192]; - - AvioStream(Decoder *_decoder, InputStream &_input) - :decoder(_decoder), input(_input), io(nullptr) {} - - ~AvioStream() { - if (io != nullptr) - av_free(io); - } - - bool Open(); -}; - -static int -mpd_ffmpeg_stream_read(void *opaque, uint8_t *buf, int size) -{ - AvioStream *stream = (AvioStream *)opaque; - - return decoder_read(stream->decoder, stream->input, - (void *)buf, size); -} - -static int64_t -mpd_ffmpeg_stream_seek(void *opaque, int64_t pos, int whence) -{ - AvioStream *stream = (AvioStream *)opaque; - - if (whence == AVSEEK_SIZE) - return stream->input.size; - - if (!stream->input.LockSeek(pos, whence, IgnoreError())) - return -1; - - return stream->input.offset; -} - -bool -AvioStream::Open() -{ - io = avio_alloc_context(buffer, sizeof(buffer), - false, this, - mpd_ffmpeg_stream_read, nullptr, - input.seekable - ? mpd_ffmpeg_stream_seek : nullptr); - return io != nullptr; -} - -/** - * API compatibility wrapper for av_open_input_stream() and - * avformat_open_input(). - */ -static int -mpd_ffmpeg_open_input(AVFormatContext **ic_ptr, - AVIOContext *pb, - const char *filename, - AVInputFormat *fmt) -{ - AVFormatContext *context = avformat_alloc_context(); - if (context == nullptr) - return AVERROR(ENOMEM); - - context->pb = pb; - *ic_ptr = context; - return avformat_open_input(ic_ptr, filename, fmt, nullptr); -} - -static bool -ffmpeg_init(gcc_unused const config_param ¶m) -{ - av_log_set_callback(mpd_ffmpeg_log_callback); - - av_register_all(); - return true; -} - -static int -ffmpeg_find_audio_stream(const AVFormatContext *format_context) -{ - for (unsigned i = 0; i < format_context->nb_streams; ++i) - if (format_context->streams[i]->codec->codec_type == - AVMEDIA_TYPE_AUDIO) - return i; - - return -1; -} - -gcc_const -static double -time_from_ffmpeg(int64_t t, const AVRational time_base) -{ - assert(t != (int64_t)AV_NOPTS_VALUE); - - return (double)av_rescale_q(t, time_base, (AVRational){1, 1024}) - / (double)1024; -} - -gcc_const -static int64_t -time_to_ffmpeg(double t, const AVRational time_base) -{ - return av_rescale_q((int64_t)(t * 1024), (AVRational){1, 1024}, - time_base); -} - -/** - * Replace #AV_NOPTS_VALUE with the given fallback. - */ -static constexpr int64_t -timestamp_fallback(int64_t t, int64_t fallback) -{ - return gcc_likely(t != int64_t(AV_NOPTS_VALUE)) - ? t - : fallback; -} - -/** - * Accessor for AVStream::start_time that replaces AV_NOPTS_VALUE with - * zero. We can't use AV_NOPTS_VALUE in calculations, and we simply - * assume that the stream's start time is zero, which appears to be - * the best way out of that situation. - */ -static int64_t -start_time_fallback(const AVStream &stream) -{ - return timestamp_fallback(stream.start_time, 0); -} - -static void -copy_interleave_frame2(uint8_t *dest, uint8_t **src, - unsigned nframes, unsigned nchannels, - unsigned sample_size) -{ - for (unsigned frame = 0; frame < nframes; ++frame) { - for (unsigned channel = 0; channel < nchannels; ++channel) { - memcpy(dest, src[channel] + frame * sample_size, - sample_size); - dest += sample_size; - } - } -} - -/** - * Copy PCM data from a AVFrame to an interleaved buffer. - */ -static int -copy_interleave_frame(const AVCodecContext *codec_context, - const AVFrame *frame, - uint8_t **output_buffer, - uint8_t **global_buffer, int *global_buffer_size) -{ - int plane_size; - const int data_size = - av_samples_get_buffer_size(&plane_size, - codec_context->channels, - frame->nb_samples, - codec_context->sample_fmt, 1); - if (data_size <= 0) - return data_size; - - if (av_sample_fmt_is_planar(codec_context->sample_fmt) && - codec_context->channels > 1) { - if(*global_buffer_size < data_size) { - av_freep(global_buffer); - - *global_buffer = (uint8_t*)av_malloc(data_size); - - if (!*global_buffer) - /* Not enough memory - shouldn't happen */ - return AVERROR(ENOMEM); - *global_buffer_size = data_size; - } - *output_buffer = *global_buffer; - copy_interleave_frame2(*output_buffer, frame->extended_data, - frame->nb_samples, - codec_context->channels, - av_get_bytes_per_sample(codec_context->sample_fmt)); - } else { - *output_buffer = frame->extended_data[0]; - } - - return data_size; -} - -static DecoderCommand -ffmpeg_send_packet(Decoder &decoder, InputStream &is, - const AVPacket *packet, - AVCodecContext *codec_context, - const AVStream *stream, - AVFrame *frame, - uint8_t **buffer, int *buffer_size) -{ - if (packet->pts >= 0 && packet->pts != (int64_t)AV_NOPTS_VALUE) - decoder_timestamp(decoder, - time_from_ffmpeg(packet->pts - start_time_fallback(*stream), - stream->time_base)); - - AVPacket packet2 = *packet; - - uint8_t *output_buffer; - - DecoderCommand cmd = DecoderCommand::NONE; - while (packet2.size > 0 && cmd == DecoderCommand::NONE) { - int audio_size = 0; - int got_frame = 0; - int len = avcodec_decode_audio4(codec_context, - frame, &got_frame, - &packet2); - if (len >= 0 && got_frame) { - audio_size = copy_interleave_frame(codec_context, - frame, - &output_buffer, - buffer, buffer_size); - if (audio_size < 0) - len = audio_size; - } - - if (len < 0) { - /* if error, we skip the frame */ - LogDefault(ffmpeg_domain, - "decoding failed, frame skipped"); - break; - } - - packet2.data += len; - packet2.size -= len; - - if (audio_size <= 0) - continue; - - cmd = decoder_data(decoder, is, - output_buffer, audio_size, - codec_context->bit_rate / 1000); - } - return cmd; -} - -gcc_const -static SampleFormat -ffmpeg_sample_format(enum AVSampleFormat sample_fmt) -{ - switch (sample_fmt) { - case AV_SAMPLE_FMT_S16: - case AV_SAMPLE_FMT_S16P: - return SampleFormat::S16; - - case AV_SAMPLE_FMT_S32: - case AV_SAMPLE_FMT_S32P: - return SampleFormat::S32; - - case AV_SAMPLE_FMT_FLTP: - return SampleFormat::FLOAT; - - default: - break; - } - - char buffer[64]; - const char *name = av_get_sample_fmt_string(buffer, sizeof(buffer), - sample_fmt); - if (name != nullptr) - FormatError(ffmpeg_domain, - "Unsupported libavcodec SampleFormat value: %s (%d)", - name, sample_fmt); - else - FormatError(ffmpeg_domain, - "Unsupported libavcodec SampleFormat value: %d", - sample_fmt); - return SampleFormat::UNDEFINED; -} - -static AVInputFormat * -ffmpeg_probe(Decoder *decoder, InputStream &is) -{ - enum { - BUFFER_SIZE = 16384, - PADDING = 16, - }; - - unsigned char buffer[BUFFER_SIZE]; - size_t nbytes = decoder_read(decoder, is, buffer, BUFFER_SIZE); - if (nbytes <= PADDING || !is.LockRewind(IgnoreError())) - return nullptr; - - /* some ffmpeg parsers (e.g. ac3_parser.c) read a few bytes - beyond the declared buffer limit, which makes valgrind - angry; this workaround removes some padding from the buffer - size */ - nbytes -= PADDING; - - AVProbeData avpd; - avpd.buf = buffer; - avpd.buf_size = nbytes; - avpd.filename = is.uri.c_str(); - - return av_probe_input_format(&avpd, true); -} - -static void -ffmpeg_decode(Decoder &decoder, InputStream &input) -{ - AVInputFormat *input_format = ffmpeg_probe(&decoder, input); - if (input_format == nullptr) - return; - - FormatDebug(ffmpeg_domain, "detected input format '%s' (%s)", - input_format->name, input_format->long_name); - - AvioStream stream(&decoder, input); - if (!stream.Open()) { - LogError(ffmpeg_domain, "Failed to open stream"); - return; - } - - //ffmpeg works with ours "fileops" helper - AVFormatContext *format_context = nullptr; - if (mpd_ffmpeg_open_input(&format_context, stream.io, - input.uri.c_str(), - input_format) != 0) { - LogError(ffmpeg_domain, "Open failed"); - return; - } - - const int find_result = - avformat_find_stream_info(format_context, nullptr); - if (find_result < 0) { - LogError(ffmpeg_domain, "Couldn't find stream info"); - avformat_close_input(&format_context); - return; - } - - int audio_stream = ffmpeg_find_audio_stream(format_context); - if (audio_stream == -1) { - LogError(ffmpeg_domain, "No audio stream inside"); - avformat_close_input(&format_context); - return; - } - - AVStream *av_stream = format_context->streams[audio_stream]; - - AVCodecContext *codec_context = av_stream->codec; - -#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(54, 25, 0) - const AVCodecDescriptor *codec_descriptor = - avcodec_descriptor_get(codec_context->codec_id); - if (codec_descriptor != nullptr) - FormatDebug(ffmpeg_domain, "codec '%s'", - codec_descriptor->name); -#else - if (codec_context->codec_name[0] != 0) - FormatDebug(ffmpeg_domain, "codec '%s'", - codec_context->codec_name); -#endif - - AVCodec *codec = avcodec_find_decoder(codec_context->codec_id); - - if (!codec) { - LogError(ffmpeg_domain, "Unsupported audio codec"); - avformat_close_input(&format_context); - return; - } - - const SampleFormat sample_format = - ffmpeg_sample_format(codec_context->sample_fmt); - if (sample_format == SampleFormat::UNDEFINED) - return; - - Error error; - AudioFormat audio_format; - if (!audio_format_init_checked(audio_format, - codec_context->sample_rate, - sample_format, - codec_context->channels, error)) { - LogError(error); - avformat_close_input(&format_context); - return; - } - - /* the audio format must be read from AVCodecContext by now, - because avcodec_open() has been demonstrated to fill bogus - values into AVCodecContext.channels - a change that will be - reverted later by avcodec_decode_audio3() */ - - const int open_result = avcodec_open2(codec_context, codec, nullptr); - if (open_result < 0) { - LogError(ffmpeg_domain, "Could not open codec"); - avformat_close_input(&format_context); - return; - } - - int total_time = format_context->duration != (int64_t)AV_NOPTS_VALUE - ? format_context->duration / AV_TIME_BASE - : 0; - - decoder_initialized(decoder, audio_format, - input.seekable, total_time); - -#if LIBAVUTIL_VERSION_MAJOR >= 53 - AVFrame *frame = av_frame_alloc(); -#else - AVFrame *frame = avcodec_alloc_frame(); -#endif - if (!frame) { - LogError(ffmpeg_domain, "Could not allocate frame"); - avformat_close_input(&format_context); - return; - } - - uint8_t *interleaved_buffer = nullptr; - int interleaved_buffer_size = 0; - - DecoderCommand cmd; - do { - AVPacket packet; - if (av_read_frame(format_context, &packet) < 0) - /* end of file */ - break; - - if (packet.stream_index == audio_stream) - cmd = ffmpeg_send_packet(decoder, input, - &packet, codec_context, - av_stream, - frame, - &interleaved_buffer, &interleaved_buffer_size); - else - cmd = decoder_get_command(decoder); - - av_free_packet(&packet); - - if (cmd == DecoderCommand::SEEK) { - int64_t where = - time_to_ffmpeg(decoder_seek_where(decoder), - av_stream->time_base) + - start_time_fallback(*av_stream); - - if (av_seek_frame(format_context, audio_stream, where, - AVSEEK_FLAG_ANY) < 0) - decoder_seek_error(decoder); - else { - avcodec_flush_buffers(codec_context); - decoder_command_finished(decoder); - } - } - } while (cmd != DecoderCommand::STOP); - -#if LIBAVUTIL_VERSION_MAJOR >= 53 - av_frame_free(&frame); -#elif LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(54, 28, 0) - avcodec_free_frame(&frame); -#else - av_freep(&frame); -#endif - av_freep(&interleaved_buffer); - - avcodec_close(codec_context); - avformat_close_input(&format_context); -} - -//no tag reading in ffmpeg, check if playable -static bool -ffmpeg_scan_stream(InputStream &is, - const struct tag_handler *handler, void *handler_ctx) -{ - AVInputFormat *input_format = ffmpeg_probe(nullptr, is); - if (input_format == nullptr) - return false; - - AvioStream stream(nullptr, is); - if (!stream.Open()) - return false; - - AVFormatContext *f = nullptr; - if (mpd_ffmpeg_open_input(&f, stream.io, is.uri.c_str(), - input_format) != 0) - return false; - - const int find_result = - avformat_find_stream_info(f, nullptr); - if (find_result < 0) { - avformat_close_input(&f); - return false; - } - - if (f->duration != (int64_t)AV_NOPTS_VALUE) - tag_handler_invoke_duration(handler, handler_ctx, - f->duration / AV_TIME_BASE); - - ffmpeg_scan_dictionary(f->metadata, handler, handler_ctx); - int idx = ffmpeg_find_audio_stream(f); - if (idx >= 0) - ffmpeg_scan_dictionary(f->streams[idx]->metadata, - handler, handler_ctx); - - avformat_close_input(&f); - return true; -} - -/** - * A list of extensions found for the formats supported by ffmpeg. - * This list is current as of 02-23-09; To find out if there are more - * supported formats, check the ffmpeg changelog since this date for - * more formats. - */ -static const char *const ffmpeg_suffixes[] = { - "16sv", "3g2", "3gp", "4xm", "8svx", "aa3", "aac", "ac3", "afc", "aif", - "aifc", "aiff", "al", "alaw", "amr", "anim", "apc", "ape", "asf", - "atrac", "au", "aud", "avi", "avm2", "avs", "bap", "bfi", "c93", "cak", - "cin", "cmv", "cpk", "daud", "dct", "divx", "dts", "dv", "dvd", "dxa", - "eac3", "film", "flac", "flc", "fli", "fll", "flx", "flv", "g726", - "gsm", "gxf", "iss", "m1v", "m2v", "m2t", "m2ts", - "m4a", "m4b", "m4v", - "mad", - "mj2", "mjpeg", "mjpg", "mka", "mkv", "mlp", "mm", "mmf", "mov", "mp+", - "mp1", "mp2", "mp3", "mp4", "mpc", "mpeg", "mpg", "mpga", "mpp", "mpu", - "mve", "mvi", "mxf", "nc", "nsv", "nut", "nuv", "oga", "ogm", "ogv", - "ogx", "oma", "ogg", "omg", "psp", "pva", "qcp", "qt", "r3d", "ra", - "ram", "rl2", "rm", "rmvb", "roq", "rpl", "rvc", "shn", "smk", "snd", - "sol", "son", "spx", "str", "swf", "tgi", "tgq", "tgv", "thp", "ts", - "tsp", "tta", "xa", "xvid", "uv", "uv2", "vb", "vid", "vob", "voc", - "vp6", "vmd", "wav", "webm", "wma", "wmv", "wsaud", "wsvga", "wv", - "wve", - nullptr -}; - -static const char *const ffmpeg_mime_types[] = { - "application/flv", - "application/m4a", - "application/mp4", - "application/octet-stream", - "application/ogg", - "application/x-ms-wmz", - "application/x-ms-wmd", - "application/x-ogg", - "application/x-shockwave-flash", - "application/x-shorten", - "audio/8svx", - "audio/16sv", - "audio/aac", - "audio/ac3", - "audio/aiff" - "audio/amr", - "audio/basic", - "audio/flac", - "audio/m4a", - "audio/mp4", - "audio/mpeg", - "audio/musepack", - "audio/ogg", - "audio/qcelp", - "audio/vorbis", - "audio/vorbis+ogg", - "audio/x-8svx", - "audio/x-16sv", - "audio/x-aac", - "audio/x-ac3", - "audio/x-aiff" - "audio/x-alaw", - "audio/x-au", - "audio/x-dca", - "audio/x-eac3", - "audio/x-flac", - "audio/x-gsm", - "audio/x-mace", - "audio/x-matroska", - "audio/x-monkeys-audio", - "audio/x-mpeg", - "audio/x-ms-wma", - "audio/x-ms-wax", - "audio/x-musepack", - "audio/x-ogg", - "audio/x-vorbis", - "audio/x-vorbis+ogg", - "audio/x-pn-realaudio", - "audio/x-pn-multirate-realaudio", - "audio/x-speex", - "audio/x-tta" - "audio/x-voc", - "audio/x-wav", - "audio/x-wma", - "audio/x-wv", - "video/anim", - "video/quicktime", - "video/msvideo", - "video/ogg", - "video/theora", - "video/webm", - "video/x-dv", - "video/x-flv", - "video/x-matroska", - "video/x-mjpeg", - "video/x-mpeg", - "video/x-ms-asf", - "video/x-msvideo", - "video/x-ms-wmv", - "video/x-ms-wvx", - "video/x-ms-wm", - "video/x-ms-wmx", - "video/x-nut", - "video/x-pva", - "video/x-theora", - "video/x-vid", - "video/x-wmv", - "video/x-xvid", - - /* special value for the "ffmpeg" input plugin: all streams by - the "ffmpeg" input plugin shall be decoded by this - plugin */ - "audio/x-mpd-ffmpeg", - - nullptr -}; - -const struct DecoderPlugin ffmpeg_decoder_plugin = { - "ffmpeg", - ffmpeg_init, - nullptr, - ffmpeg_decode, - nullptr, - nullptr, - ffmpeg_scan_stream, - nullptr, - ffmpeg_suffixes, - ffmpeg_mime_types -}; |