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authorMax Kellermann <max@duempel.org>2010-06-30 23:27:45 +0200
committerMax Kellermann <max@duempel.org>2010-06-30 23:41:32 +0200
commit49bc317fb8b5dad101eb0d995167ce0ccaf9f7fc (patch)
tree19c7f01c48f594be5b2bf758bd7be338bc6fb21e /src/decoder/ffmpeg_plugin.c
parent375a09d6f6d09fc132976e1f82647cc56fb33640 (diff)
downloadmpd-49bc317fb8b5dad101eb0d995167ce0ccaf9f7fc.tar.gz
mpd-49bc317fb8b5dad101eb0d995167ce0ccaf9f7fc.tar.xz
mpd-49bc317fb8b5dad101eb0d995167ce0ccaf9f7fc.zip
decoder/ffmpeg: fix libavformat 0.6 by using av_open_input_stream()
libavformat 0.6 does not pass the original URI pointer to the "open" method, which leads to a crash because MPD was using a dirty hack to pass a pointer to that method. This patch switches to av_open_input_stream() with a custom ByteIOContext class, instead of doing the URI string hack with av_open_input_file(). Loosely based on a patch from Jasper St. Pierre.
Diffstat (limited to 'src/decoder/ffmpeg_plugin.c')
-rw-r--r--src/decoder/ffmpeg_plugin.c134
1 files changed, 52 insertions, 82 deletions
diff --git a/src/decoder/ffmpeg_plugin.c b/src/decoder/ffmpeg_plugin.c
index f7218e238..9bae39793 100644
--- a/src/decoder/ffmpeg_plugin.c
+++ b/src/decoder/ffmpeg_plugin.c
@@ -53,48 +53,27 @@ struct ffmpeg_context {
struct tag *tag;
};
-struct ffmpeg_stream {
- /** hack - see url_to_struct() */
- char url[64];
-
+struct mpd_ffmpeg_stream {
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;
-}
+ ByteIOContext *io;
+ unsigned char buffer[8192];
+};
-static int mpd_ffmpeg_read(URLContext *h, unsigned char *buf, int size)
+static int
+mpd_ffmpeg_stream_read(void *opaque, uint8_t *buf, int size)
{
- struct ffmpeg_stream *stream = (struct ffmpeg_stream *) h->priv_data;
+ struct mpd_ffmpeg_stream *stream = opaque;
return decoder_read(stream->decoder, stream->input,
(void *)buf, size);
}
-static int64_t mpd_ffmpeg_seek(URLContext *h, int64_t pos, int whence)
+static int64_t
+mpd_ffmpeg_stream_seek(void *opaque, int64_t pos, int whence)
{
- struct ffmpeg_stream *stream = (struct ffmpeg_stream *) h->priv_data;
+ struct mpd_ffmpeg_stream *stream = opaque;
bool ret;
if (whence == AVSEEK_SIZE)
@@ -107,25 +86,36 @@ static int64_t mpd_ffmpeg_seek(URLContext *h, int64_t pos, int whence)
return stream->input->offset;
}
-static int mpd_ffmpeg_close(URLContext *h)
+static struct mpd_ffmpeg_stream *
+mpd_ffmpeg_stream_open(struct decoder *decoder, struct input_stream *input)
{
- h->priv_data = NULL;
- return 0;
+ struct mpd_ffmpeg_stream *stream = g_new(struct mpd_ffmpeg_stream, 1);
+ stream->decoder = decoder;
+ stream->input = input;
+ stream->io = av_alloc_put_byte(stream->buffer, sizeof(stream->buffer),
+ false, stream,
+ mpd_ffmpeg_stream_read, NULL,
+ input->seekable
+ ? mpd_ffmpeg_stream_seek : NULL);
+ if (stream->io == NULL) {
+ g_free(stream);
+ return NULL;
+ }
+
+ return stream;
}
-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 void
+mpd_ffmpeg_stream_close(struct mpd_ffmpeg_stream *stream)
+{
+ av_free(stream->io);
+ g_free(stream);
+}
static bool
ffmpeg_init(G_GNUC_UNUSED const struct config_param *param)
{
av_register_all();
- register_protocol(&mpd_ffmpeg_fileops);
return true;
}
@@ -140,26 +130,6 @@ ffmpeg_find_audio_stream(const AVFormatContext *format_context)
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 AVInputFormat *
ffmpeg_probe(struct decoder *decoder, struct input_stream *is,
const char *uri)
@@ -207,42 +177,39 @@ ffmpeg_helper(const char *uri,
g_debug("detected input format '%s' (%s)",
input_format->name, input_format->long_name);
+ struct mpd_ffmpeg_stream *stream =
+ mpd_ffmpeg_stream_open(decoder, input);
+ if (stream == NULL) {
+ g_warning("Failed to open stream");
+ return false;
+ }
+
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, input_format,
- 0, NULL) != 0) {
+ if (av_open_input_stream(&format_context, stream->io, uri,
+ input_format, NULL) != 0) {
g_warning("Open failed\n");
+ mpd_ffmpeg_stream_close(stream);
return false;
}
if (av_find_stream_info(format_context)<0) {
g_warning("Couldn't find stream info\n");
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
return false;
}
audio_stream = ffmpeg_find_audio_stream(format_context);
if (audio_stream == -1) {
g_warning("No audio stream inside\n");
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
return false;
}
@@ -254,13 +221,15 @@ ffmpeg_helper(const char *uri,
if (!codec) {
g_warning("Unsupported audio codec\n");
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
return false;
}
if (avcodec_open(codec_context, codec)<0) {
g_warning("Could not open codec\n");
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
return false;
}
@@ -274,7 +243,8 @@ ffmpeg_helper(const char *uri,
ret = true;
avcodec_close(codec_context);
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
return ret;
}