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-rw-r--r--src/decoder/ffmpeg_decoder_plugin.c582
1 files changed, 582 insertions, 0 deletions
diff --git a/src/decoder/ffmpeg_decoder_plugin.c b/src/decoder/ffmpeg_decoder_plugin.c
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+++ b/src/decoder/ffmpeg_decoder_plugin.c
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+/*
+ * Copyright (C) 2003-2010 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.
+ */
+
+#include "config.h"
+#include "decoder_api.h"
+#include "audio_check.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef OLD_FFMPEG_INCLUDES
+#include <avcodec.h>
+#include <avformat.h>
+#include <avio.h>
+#else
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libavformat/avio.h>
+#endif
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "ffmpeg"
+
+struct ffmpeg_context {
+ int audio_stream;
+ AVFormatContext *format_context;
+ AVCodecContext *codec_context;
+ struct decoder *decoder;
+ struct input_stream *input;
+ struct tag *tag;
+};
+
+struct ffmpeg_stream {
+ /** hack - see url_to_struct() */
+ char url[64];
+
+ struct decoder *decoder;
+ struct input_stream *input;
+};
+
+/**
+ * Convert a faked mpd:// URL to a ffmpeg_stream structure. This is a
+ * hack because ffmpeg does not provide a nice API for passing a
+ * user-defined pointer to mpdurl_open().
+ */
+static struct ffmpeg_stream *url_to_struct(const char *url)
+{
+ union {
+ const char *in;
+ struct ffmpeg_stream *out;
+ } u = { .in = url };
+ return u.out;
+}
+
+static int mpd_ffmpeg_open(URLContext *h, const char *filename,
+ G_GNUC_UNUSED int flags)
+{
+ struct ffmpeg_stream *stream = url_to_struct(filename);
+ h->priv_data = stream;
+ h->is_streamed = stream->input->seekable ? 0 : 1;
+ return 0;
+}
+
+static int mpd_ffmpeg_read(URLContext *h, unsigned char *buf, int size)
+{
+ struct ffmpeg_stream *stream = (struct ffmpeg_stream *) h->priv_data;
+
+ return decoder_read(stream->decoder, stream->input,
+ (void *)buf, size);
+}
+
+static int64_t mpd_ffmpeg_seek(URLContext *h, int64_t pos, int whence)
+{
+ struct ffmpeg_stream *stream = (struct ffmpeg_stream *) h->priv_data;
+ bool ret;
+
+ if (whence == AVSEEK_SIZE)
+ return stream->input->size;
+
+ ret = input_stream_seek(stream->input, pos, whence, NULL);
+ if (!ret)
+ return -1;
+
+ return stream->input->offset;
+}
+
+static int mpd_ffmpeg_close(URLContext *h)
+{
+ h->priv_data = NULL;
+ return 0;
+}
+
+static URLProtocol mpd_ffmpeg_fileops = {
+ .name = "mpd",
+ .url_open = mpd_ffmpeg_open,
+ .url_read = mpd_ffmpeg_read,
+ .url_seek = mpd_ffmpeg_seek,
+ .url_close = mpd_ffmpeg_close,
+};
+
+static bool
+ffmpeg_init(G_GNUC_UNUSED const struct config_param *param)
+{
+ av_register_all();
+ register_protocol(&mpd_ffmpeg_fileops);
+ 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 ==
+ CODEC_TYPE_AUDIO)
+ return i;
+
+ return -1;
+}
+
+/**
+ * Append the suffix of the original URI to the virtual stream URI.
+ * Without this, libavformat cannot detect some of the codecs
+ * (e.g. "shorten").
+ */
+static void
+append_uri_suffix(struct ffmpeg_stream *stream, const char *uri)
+{
+ assert(stream != NULL);
+ assert(uri != NULL);
+
+ char *base = g_path_get_basename(uri);
+
+ const char *suffix = strrchr(base, '.');
+ if (suffix != NULL && suffix[1] != 0)
+ g_strlcat(stream->url, suffix, sizeof(stream->url));
+
+ g_free(base);
+}
+
+static bool
+ffmpeg_helper(const char *uri, struct input_stream *input,
+ bool (*callback)(struct ffmpeg_context *ctx),
+ struct ffmpeg_context *ctx)
+{
+ AVFormatContext *format_context;
+ AVCodecContext *codec_context;
+ AVCodec *codec;
+ int audio_stream;
+ struct ffmpeg_stream stream = {
+ .url = "mpd://X", /* only the mpd:// prefix matters */
+ };
+ bool ret;
+
+ if (uri != NULL)
+ append_uri_suffix(&stream, uri);
+
+ stream.input = input;
+ if (ctx && ctx->decoder) {
+ stream.decoder = ctx->decoder; //are we in decoding loop ?
+ } else {
+ stream.decoder = NULL;
+ }
+
+ //ffmpeg works with ours "fileops" helper
+ if (av_open_input_file(&format_context, stream.url, NULL, 0, NULL) != 0) {
+ g_warning("Open failed\n");
+ return false;
+ }
+
+ if (av_find_stream_info(format_context)<0) {
+ g_warning("Couldn't find stream info\n");
+ return false;
+ }
+
+ audio_stream = ffmpeg_find_audio_stream(format_context);
+ if (audio_stream == -1) {
+ g_warning("No audio stream inside\n");
+ return false;
+ }
+
+ codec_context = format_context->streams[audio_stream]->codec;
+ if (codec_context->codec_name[0] != 0)
+ g_debug("codec '%s'", codec_context->codec_name);
+
+ codec = avcodec_find_decoder(codec_context->codec_id);
+
+ if (!codec) {
+ g_warning("Unsupported audio codec\n");
+ return false;
+ }
+
+ if (avcodec_open(codec_context, codec)<0) {
+ g_warning("Could not open codec\n");
+ return false;
+ }
+
+ if (callback) {
+ ctx->audio_stream = audio_stream;
+ ctx->format_context = format_context;
+ ctx->codec_context = codec_context;
+
+ ret = callback(ctx);
+ } else
+ ret = true;
+
+ avcodec_close(codec_context);
+ av_close_input_file(format_context);
+
+ return ret;
+}
+
+/**
+ * On some platforms, libavcodec wants the output buffer aligned to 16
+ * bytes (because it uses SSE/Altivec internally). This function
+ * returns the aligned version of the specified buffer, and corrects
+ * the buffer size.
+ */
+static void *
+align16(void *p, size_t *length_p)
+{
+ unsigned add = 16 - (size_t)p % 16;
+
+ *length_p -= add;
+ return (char *)p + add;
+}
+
+static enum decoder_command
+ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
+ const AVPacket *packet,
+ AVCodecContext *codec_context,
+ const AVRational *time_base)
+{
+ enum decoder_command cmd = DECODE_COMMAND_NONE;
+ uint8_t audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2 + 16];
+ int16_t *aligned_buffer;
+ size_t buffer_size;
+ int len, audio_size;
+ uint8_t *packet_data;
+ int packet_size;
+
+ packet_data = packet->data;
+ packet_size = packet->size;
+
+ buffer_size = sizeof(audio_buf);
+ aligned_buffer = align16(audio_buf, &buffer_size);
+
+ while ((packet_size > 0) && (cmd == DECODE_COMMAND_NONE)) {
+ audio_size = buffer_size;
+ len = avcodec_decode_audio2(codec_context,
+ aligned_buffer, &audio_size,
+ packet_data, packet_size);
+
+ if (len < 0) {
+ /* if error, we skip the frame */
+ g_message("decoding failed\n");
+ break;
+ }
+
+ packet_data += len;
+ packet_size -= len;
+
+ if (audio_size <= 0)
+ continue;
+
+ if (packet->pts != (int64_t)AV_NOPTS_VALUE)
+ decoder_timestamp(decoder,
+ av_rescale_q(packet->pts, *time_base,
+ (AVRational){1, 1}));
+
+ cmd = decoder_data(decoder, is,
+ aligned_buffer, audio_size,
+ codec_context->bit_rate / 1000);
+ }
+ return cmd;
+}
+
+static enum sample_format
+ffmpeg_sample_format(G_GNUC_UNUSED const AVCodecContext *codec_context)
+{
+#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(41<<8)+0)
+ int bits = (uint8_t) av_get_bits_per_sample_format(codec_context->sample_fmt);
+
+ /* XXX implement & test other sample formats */
+
+ switch (bits) {
+ case 16:
+ return SAMPLE_FORMAT_S16;
+ }
+
+ return SAMPLE_FORMAT_UNDEFINED;
+#else
+ /* XXX fixme 16-bit for older ffmpeg (13 Aug 2007) */
+ return SAMPLE_FORMAT_S16;
+#endif
+}
+
+static bool
+ffmpeg_decode_internal(struct ffmpeg_context *ctx)
+{
+ GError *error = NULL;
+ struct decoder *decoder = ctx->decoder;
+ AVCodecContext *codec_context = ctx->codec_context;
+ AVFormatContext *format_context = ctx->format_context;
+ AVPacket packet;
+ struct audio_format audio_format;
+ enum decoder_command cmd;
+ int total_time;
+
+ total_time = 0;
+
+ if (!audio_format_init_checked(&audio_format,
+ codec_context->sample_rate,
+ ffmpeg_sample_format(codec_context),
+ codec_context->channels, &error)) {
+ g_warning("%s", error->message);
+ g_error_free(error);
+ return false;
+ }
+
+ //there is some problem with this on some demux (mp3 at least)
+ if (format_context->duration != (int64_t)AV_NOPTS_VALUE) {
+ total_time = format_context->duration / AV_TIME_BASE;
+ }
+
+ decoder_initialized(decoder, &audio_format,
+ ctx->input->seekable, total_time);
+
+ do {
+ if (av_read_frame(format_context, &packet) < 0)
+ /* end of file */
+ break;
+
+ if (packet.stream_index == ctx->audio_stream)
+ cmd = ffmpeg_send_packet(decoder, ctx->input,
+ &packet, codec_context,
+ &format_context->streams[ctx->audio_stream]->time_base);
+ else
+ cmd = decoder_get_command(decoder);
+
+ av_free_packet(&packet);
+
+ if (cmd == DECODE_COMMAND_SEEK) {
+ int64_t where =
+ decoder_seek_where(decoder) * AV_TIME_BASE;
+
+ if (av_seek_frame(format_context, -1, where, 0) < 0)
+ decoder_seek_error(decoder);
+ else
+ decoder_command_finished(decoder);
+ }
+ } while (cmd != DECODE_COMMAND_STOP);
+
+ return true;
+}
+
+static void
+ffmpeg_decode(struct decoder *decoder, struct input_stream *input)
+{
+ struct ffmpeg_context ctx;
+
+ ctx.input = input;
+ ctx.decoder = decoder;
+
+ ffmpeg_helper(decoder_get_uri(decoder), input,
+ ffmpeg_decode_internal, &ctx);
+}
+
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(31<<8)+0)
+static bool
+ffmpeg_copy_metadata(struct tag *tag, AVMetadata *m,
+ enum tag_type type, const char *name)
+{
+ AVMetadataTag *mt = NULL;
+
+ while ((mt = av_metadata_get(m, name, mt, 0)) != NULL)
+ tag_add_item(tag, type, mt->value);
+ return mt != NULL;
+}
+#endif
+
+static bool ffmpeg_tag_internal(struct ffmpeg_context *ctx)
+{
+ struct tag *tag = (struct tag *) ctx->tag;
+ AVFormatContext *f = ctx->format_context;
+
+ tag->time = 0;
+ if (f->duration != (int64_t)AV_NOPTS_VALUE)
+ tag->time = f->duration / AV_TIME_BASE;
+
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(31<<8)+0)
+ av_metadata_conv(f, NULL, f->iformat->metadata_conv);
+
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_TITLE, "title");
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_ARTIST, "author");
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_ALBUM, "album");
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_COMMENT, "comment");
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_GENRE, "genre");
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_TRACK, "track");
+ ffmpeg_copy_metadata(tag, f->metadata, TAG_DATE, "year");
+#else
+ if (f->author[0])
+ tag_add_item(tag, TAG_ARTIST, f->author);
+ if (f->title[0])
+ tag_add_item(tag, TAG_TITLE, f->title);
+ if (f->album[0])
+ tag_add_item(tag, TAG_ALBUM, f->album);
+
+ if (f->track > 0) {
+ char buffer[16];
+ snprintf(buffer, sizeof(buffer), "%d", f->track);
+ tag_add_item(tag, TAG_TRACK, buffer);
+ }
+
+ if (f->comment[0])
+ tag_add_item(tag, TAG_COMMENT, f->comment);
+ if (f->genre[0])
+ tag_add_item(tag, TAG_GENRE, f->genre);
+ if (f->year > 0) {
+ char buffer[16];
+ snprintf(buffer, sizeof(buffer), "%d", f->year);
+ tag_add_item(tag, TAG_DATE, buffer);
+ }
+
+#endif
+ return true;
+}
+
+//no tag reading in ffmpeg, check if playable
+static struct tag *
+ffmpeg_stream_tag(struct input_stream *is)
+{
+ struct ffmpeg_context ctx;
+ bool ret;
+
+ ctx.decoder = NULL;
+ ctx.tag = tag_new();
+
+ ret = ffmpeg_helper(NULL, is, ffmpeg_tag_internal, &ctx);
+ if (!ret) {
+ tag_free(ctx.tag);
+ ctx.tag = NULL;
+ }
+
+ return ctx.tag;
+}
+
+/**
+ * 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", "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", "wma", "wmv", "wsaud", "wsvga", "wv", "wve",
+ NULL
+};
+
+static const char *const ffmpeg_mime_types[] = {
+ "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/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",
+ NULL
+};
+
+const struct decoder_plugin ffmpeg_decoder_plugin = {
+ .name = "ffmpeg",
+ .init = ffmpeg_init,
+ .stream_decode = ffmpeg_decode,
+ .stream_tag = ffmpeg_stream_tag,
+ .suffixes = ffmpeg_suffixes,
+ .mime_types = ffmpeg_mime_types
+};