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authorMax Kellermann <max@duempel.org>2010-06-30 08:59:31 +0200
committerMax Kellermann <max@duempel.org>2010-07-19 23:03:06 +0200
commite2e8d0d2f35e7ea4d9bc20d92f624bc957fd8060 (patch)
tree1bbba818a2d576c1fcd9e861bb149c71c41b59c4 /src
parentb2e3c0757b2507db727d5b722b5043d3f98c7ee5 (diff)
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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')
-rw-r--r--src/decoder/ffmpeg_decoder_plugin.c154
1 files changed, 65 insertions, 89 deletions
diff --git a/src/decoder/ffmpeg_decoder_plugin.c b/src/decoder/ffmpeg_decoder_plugin.c
index 94b60ecb5..d47356581 100644
--- a/src/decoder/ffmpeg_decoder_plugin.c
+++ b/src/decoder/ffmpeg_decoder_plugin.c
@@ -81,48 +81,27 @@ mpd_ffmpeg_log_callback(G_GNUC_UNUSED void *ptr, int level,
#endif /* !OLD_FFMPEG_INCLUDES */
-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)
@@ -135,19 +114,31 @@ 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)
@@ -157,7 +148,6 @@ ffmpeg_init(G_GNUC_UNUSED const struct config_param *param)
#endif
av_register_all();
- register_protocol(&mpd_ffmpeg_fileops);
return true;
}
@@ -173,26 +163,6 @@ ffmpeg_find_audio_stream(const AVFormatContext *format_context)
}
/**
- * 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);
-}
-
-/**
* 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
@@ -320,36 +290,38 @@ ffmpeg_decode(struct decoder *decoder, struct input_stream *input)
g_debug("detected input format '%s' (%s)",
input_format->name, input_format->long_name);
- struct ffmpeg_stream stream = {
- .url = "mpd://X", /* only the mpd:// prefix matters */
- .decoder = decoder,
- .input = input,
- };
+ struct mpd_ffmpeg_stream *stream =
+ mpd_ffmpeg_stream_open(decoder, input);
+ if (stream == NULL) {
+ g_warning("Failed to open stream");
+ return;
+ }
+
AVFormatContext *format_context;
AVCodecContext *codec_context;
AVCodec *codec;
int audio_stream;
- if (input->uri != NULL)
- append_uri_suffix(&stream, input->uri);
-
//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, input->uri,
+ input_format, NULL) != 0) {
g_warning("Open failed\n");
+ mpd_ffmpeg_stream_close(stream);
return;
}
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;
}
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;
}
@@ -361,13 +333,15 @@ ffmpeg_decode(struct decoder *decoder, struct input_stream *input)
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;
}
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;
}
@@ -380,7 +354,8 @@ ffmpeg_decode(struct decoder *decoder, struct input_stream *input)
g_warning("%s", error->message);
g_error_free(error);
avcodec_close(codec_context);
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
return;
}
@@ -419,7 +394,8 @@ ffmpeg_decode(struct decoder *decoder, struct input_stream *input)
} while (cmd != DECODE_COMMAND_STOP);
avcodec_close(codec_context);
- av_close_input_file(format_context);
+ av_close_input_stream(format_context);
+ mpd_ffmpeg_stream_close(stream);
}
#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(31<<8)+0)
@@ -470,21 +446,20 @@ ffmpeg_stream_tag(struct input_stream *is)
if (input_format == NULL)
return NULL;
- struct ffmpeg_stream stream = {
- .url = "mpd://X", /* only the mpd:// prefix matters */
- .decoder = NULL,
- .input = is,
- };
-
- if (is->uri != NULL)
- append_uri_suffix(&stream, is->uri);
+ struct mpd_ffmpeg_stream *stream = mpd_ffmpeg_stream_open(NULL, is);
+ if (stream == NULL)
+ return NULL;
AVFormatContext *f;
- if (av_open_input_file(&f, stream.url, input_format, 0, NULL) != 0)
+ if (av_open_input_stream(&f, stream->io, is->uri,
+ input_format, NULL) != 0) {
+ mpd_ffmpeg_stream_close(stream);
return NULL;
+ }
if (av_find_stream_info(f) < 0) {
- av_close_input_file(f);
+ av_close_input_stream(f);
+ mpd_ffmpeg_stream_close(stream);
return NULL;
}
@@ -529,7 +504,8 @@ ffmpeg_stream_tag(struct input_stream *is)
#endif
- av_close_input_file(f);
+ av_close_input_stream(f);
+ mpd_ffmpeg_stream_close(stream);
return tag;
}