decoder/ffmpeg: require ffmpeg/libav 0.7.6

This is the version present in Ubuntu Oneiric, the oldest distribution
with gcc 4.6.  Debian Squeeze is off target, because it has gcc 4.4,
which is unable to compile MPD anyway.

This commit drops all API compatibility hacks for older versions.

3 files changed, 3 insertions, 82 deletions

diff --git a/src/decoder/FfmpegDecoderPlugin.cxx b/src/decoder/FfmpegDecoderPlugin.cxx
index e89f35ef..e4081377 100644
--- a/src/decoder/FfmpegDecoderPlugin.cxx
+++ b/src/decoder/FfmpegDecoderPlugin.cxx
@@ -49,9 +49,7 @@ extern "C" {
 #include <libavutil/avutil.h>
 #include <libavutil/log.h>
 #include <libavutil/mathematics.h>
-#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,5,0)
 #include <libavutil/dict.h>
-#endif
 }
 
 #undef G_LOG_DOMAIN
@@ -92,11 +90,8 @@ struct mpd_ffmpeg_stream {
 	struct decoder *decoder;
 	struct input_stream *input;
 
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(52,101,0)
 	AVIOContext *io;
-#else
-	ByteIOContext *io;
-#endif
+
 	unsigned char buffer[8192];
 };
 
@@ -129,19 +124,11 @@ mpd_ffmpeg_stream_open(struct decoder *decoder, struct input_stream *input)
 	struct mpd_ffmpeg_stream *stream = g_new(struct mpd_ffmpeg_stream, 1);
 	stream->decoder = decoder;
 	stream->input = input;
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(52,101,0)
 	stream->io = avio_alloc_context(stream->buffer, sizeof(stream->buffer),
 					false, stream,
 					mpd_ffmpeg_stream_read, NULL,
 					input->seekable
 					? mpd_ffmpeg_stream_seek : NULL);
-#else
-	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);
-#endif
 	if (stream->io == NULL) {
 		g_free(stream);
 		return NULL;
@@ -156,15 +143,10 @@ mpd_ffmpeg_stream_open(struct decoder *decoder, struct input_stream *input)
  */
 static int
 mpd_ffmpeg_open_input(AVFormatContext **ic_ptr,
-#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(52,101,0)
 		      AVIOContext *pb,
-#else
-		      ByteIOContext *pb,
-#endif
 		      const char *filename,
 		      AVInputFormat *fmt)
 {
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(53,1,3)
 	AVFormatContext *context = avformat_alloc_context();
 	if (context == NULL)
 		return AVERROR(ENOMEM);
@@ -172,9 +154,6 @@ mpd_ffmpeg_open_input(AVFormatContext **ic_ptr,
 	context->pb = pb;
 	*ic_ptr = context;
 	return avformat_open_input(ic_ptr, filename, fmt, NULL);
-#else
-	return av_open_input_stream(ic_ptr, pb, filename, fmt, NULL);
-#endif
 }
 
 static void
@@ -198,11 +177,7 @@ 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 ==
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52, 64, 0)
 		    AVMEDIA_TYPE_AUDIO)
-#else
-		    CODEC_TYPE_AUDIO)
-#endif
 			return i;
 
 	return -1;
@@ -301,12 +276,7 @@ ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
 		decoder_timestamp(decoder,
 				  time_from_ffmpeg(packet->pts, *time_base));
 
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,25,0)
 	AVPacket packet2 = *packet;
-#else
-	const uint8_t *packet_data = packet->data;
-	int packet_size = packet->size;
-#endif
 
 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(53,25,0)
 	uint8_t aligned_buffer[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2 + 16];
@@ -319,12 +289,7 @@ ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
 #endif
 
 	enum decoder_command cmd = DECODE_COMMAND_NONE;
-	while (
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,25,0)
-	       packet2.size > 0 &&
-#else
-	       packet_size > 0 &&
-#endif
+	while (packet2.size > 0 &&
 	       cmd == DECODE_COMMAND_NONE) {
 		int audio_size = buffer_size;
 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(53,25,0)
@@ -342,14 +307,10 @@ ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
 				len = audio_size;
 		} else if (len >= 0)
 			len = -1;
-#elif LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,25,0)
+#else
 		int len = avcodec_decode_audio3(codec_context,
 						aligned_buffer, &audio_size,
 						&packet2);
-#else
-		int len = avcodec_decode_audio2(codec_context,
-						aligned_buffer, &audio_size,
-						packet_data, packet_size);
 #endif
 
 		if (len < 0) {
@@ -358,13 +319,8 @@ ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
 			break;
 		}
 
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,25,0)
 		packet2.data += len;
 		packet2.size -= len;
-#else
-		packet_data += len;
-		packet_size -= len;
-#endif
 
 		if (audio_size <= 0)
 			continue;
@@ -376,33 +332,21 @@ ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
 	return cmd;
 }
 
-#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(52, 94, 1)
-#define AVSampleFormat SampleFormat
-#endif
-
 G_GNUC_CONST
 static enum sample_format
 ffmpeg_sample_format(enum AVSampleFormat sample_fmt)
 {
 	switch (sample_fmt) {
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52, 94, 1)
 	case AV_SAMPLE_FMT_S16:
 #if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,17,0)
 	case AV_SAMPLE_FMT_S16P:
 #endif
-#else
-	case SAMPLE_FMT_S16:
-#endif
 		return SAMPLE_FORMAT_S16;
 
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52, 94, 1)
 	case AV_SAMPLE_FMT_S32:
 #if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,17,0)
 	case AV_SAMPLE_FMT_S32P:
 #endif
-#else
-	case SAMPLE_FMT_S32:
-#endif
 		return SAMPLE_FORMAT_S32;
 
 #if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,17,0)
@@ -414,7 +358,6 @@ ffmpeg_sample_format(enum AVSampleFormat sample_fmt)
 		break;
 	}
 
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52, 94, 1)
 	char buffer[64];
 	const char *name = av_get_sample_fmt_string(buffer, sizeof(buffer),
 						    sample_fmt);
@@ -422,7 +365,6 @@ ffmpeg_sample_format(enum AVSampleFormat sample_fmt)
 		g_warning("Unsupported libavcodec SampleFormat value: %s (%d)",
 			  name, sample_fmt);
 	else
-#endif
 		g_warning("Unsupported libavcodec SampleFormat value: %d",
 			  sample_fmt);
 	return SAMPLE_FORMAT_UNDEFINED;
@@ -665,10 +607,6 @@ ffmpeg_scan_stream(struct input_stream *is,
 		tag_handler_invoke_duration(handler, handler_ctx,
 					    f->duration / AV_TIME_BASE);
 
-#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(52,101,0)
-	av_metadata_conv(f, NULL, f->iformat->metadata_conv);
-#endif
-
 	ffmpeg_scan_dictionary(f->metadata, handler, handler_ctx);
 	int idx = ffmpeg_find_audio_stream(f);
 	if (idx >= 0)
diff --git a/src/decoder/FfmpegMetaData.cxx b/src/decoder/FfmpegMetaData.cxx
index d3000591..2d7ebbca 100644
--- a/src/decoder/FfmpegMetaData.cxx
+++ b/src/decoder/FfmpegMetaData.cxx
@@ -29,9 +29,6 @@
 #define G_LOG_DOMAIN "ffmpeg"
 
 static const struct tag_table ffmpeg_tags[] = {
-#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(52,50,0)
-	{ "author", TAG_ARTIST },
-#endif
 	{ "year", TAG_DATE },
 	{ "author-sort", TAG_ARTIST_SORT },
 	{ "album_artist", TAG_ALBUM_ARTIST },
@@ -53,8 +50,6 @@ ffmpeg_copy_metadata(enum tag_type type,
 				       type, mt->value);
 }
 
-#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,5,0)
-
 static void
 ffmpeg_scan_pairs(AVDictionary *dict,
 		  const struct tag_handler *handler, void *handler_ctx)
@@ -66,8 +61,6 @@ ffmpeg_scan_pairs(AVDictionary *dict,
 					i->key, i->value);
 }
 
-#endif
-
 void
 ffmpeg_scan_dictionary(AVDictionary *dict,
 		       const struct tag_handler *handler, void *handler_ctx)
@@ -81,8 +74,6 @@ ffmpeg_scan_dictionary(AVDictionary *dict,
 		ffmpeg_copy_metadata(i->type, dict, i->name,
 				     handler, handler_ctx);
 
-#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,5,0)
 	if (handler->pair != NULL)
 		ffmpeg_scan_pairs(dict, handler, handler_ctx);
-#endif
 }
diff --git a/src/decoder/FfmpegMetaData.hxx b/src/decoder/FfmpegMetaData.hxx
index f76e1628..466d2cb1 100644
--- a/src/decoder/FfmpegMetaData.hxx
+++ b/src/decoder/FfmpegMetaData.hxx
@@ -23,17 +23,9 @@
 extern "C" {
 #include <libavformat/avformat.h>
 #include <libavutil/avutil.h>
-#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,5,0)
 #include <libavutil/dict.h>
-#endif
 }
 
-#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53,1,0)
-#define AVDictionary AVMetadata
-#define AVDictionaryEntry AVMetadataTag
-#define av_dict_get av_metadata_get
-#endif
-
 struct tag_handler;
 
 void