Merge remote-tracking branch 'qatar/master'

* qatar/master:
  lavf: simplify is_intra_only() by using codec descriptors.
  lavc: add an intra-only codec property.
  lavc: add codec descriptors.
  lavc: fix mixing CODEC_ID/AV_CODEC_ID in C++ code.
  dict: move struct AVDictionary definition to dict.c
  dict: add av_dict_count()

Conflicts:
	doc/APIchanges
	libavcodec/old_codec_ids.h
	libavformat/utils.c
	libavutil/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/APIchanges

@@ -70,8 +70,15 @@ API changes, most recent first:
 2012-03-26 - a67d9cf - lavfi 2.66.100
   Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
 
+2012-08-08 - xxxxxxx - lavu 51.38 - dict.h
+  Add av_dict_count().
+
 2012-08-xx - xxxxxxx - lavc 54.25 - avcodec.h
   Rename CodecID to AVCodecID and all CODEC_ID_* to AV_CODEC_ID_*.
+  To provide backwards compatibility, CodecID is now #defined as AVCodecID.
+  Note that this can break user code that includes avcodec.h and uses the
+  'CodecID' identifier. Such code should either #undef CodecID or stop using the
+  CodecID name.
 
 2012-08-03 - xxxxxxx - lavu 51.37.1 - cpu.h
                        lsws 2.1.1   - swscale.h

libavcodec/Makefile

@@ -18,6 +18,7 @@ OBJS = allcodecs.o                                                      \
        avpacket.o                                                       \
        bitstream.o                                                      \
        bitstream_filter.o                                               \
+       codec_desc.o                                                     \
        dsputil.o                                                        \
        faanidct.o                                                       \
        fmtconvert.o                                                     \
@@ -787,6 +788,7 @@ SKIPHEADERS                            += %_tablegen.h                  \
                                           aac_tablegen_decl.h           \
                                           codec_names.h                 \
                                           fft-internal.h                \
+                                          old_codec_ids.h               \
                                           tableprint.h                  \
                                           $(ARCH)/vp56_arith.h          \
 

libavcodec/avcodec.h

@@ -77,9 +77,6 @@
  * @{
  */
 
-#if FF_API_CODEC_ID
-#include "old_codec_ids.h"
-#endif
 
 /**
  * Identify the syntax and semantics of the bitstream.
@@ -459,8 +456,46 @@ enum AVCodecID {
     AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
                                 * stream (only used by libavformat) */
     AV_CODEC_ID_FFMETADATA = 0x21000,   ///< Dummy codec for streams containing only metadata information.
+
+#if FF_API_CODEC_ID
+#include "old_codec_ids.h"
+#endif
 };
 
+#if FF_API_CODEC_ID
+#define CodecID AVCodecID
+#endif
+
+/**
+ * This struct describes the properties of a single codec described by an
+ * AVCodecID.
+ * @see avcodec_get_descriptor()
+ */
+typedef struct AVCodecDescriptor {
+    enum AVCodecID     id;
+    enum AVMediaType type;
+    /**
+     * Name of the codec described by this descriptor. It is non-empty and
+     * unique for each codec descriptor. It should contain alphanumeric
+     * characters and '_' only.
+     */
+    const char      *name;
+    /**
+     * A more descriptive name for this codec. May be NULL.
+     */
+    const char *long_name;
+    /**
+     * Codec properties, a combination of AV_CODEC_PROP_* flags.
+     */
+    int             props;
+} AVCodecDescriptor;
+
+/**
+ * Codec uses only intra compression.
+ * Video codecs only.
+ */
+#define AV_CODEC_PROP_INTRA_ONLY    (1 << 0)
+
 #if FF_API_OLD_DECODE_AUDIO
 /* in bytes */
 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
@@ -4793,6 +4828,20 @@ int av_codec_is_encoder(AVCodec *codec);
  */
 int av_codec_is_decoder(AVCodec *codec);
 
+/**
+ * @return descriptor for given codec ID or NULL if no descriptor exists.
+ */
+const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id);
+
+/**
+ * Iterate over all codec descriptors known to libavcodec.
+ *
+ * @param prev previous descriptor. NULL to get the first descriptor.
+ *
+ * @return next descriptor or NULL after the last descriptor
+ */
+const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev);
+
 /**
  * @}
  */

libavcodec/old_codec_ids.h

@@ -19,7 +19,6 @@
 #ifndef AVCODEC_OLD_CODEC_IDS_H
 #define AVCODEC_OLD_CODEC_IDS_H
 
-#include "libavutil/attributes.h"
 #include "libavutil/common.h"
 
 /*
@@ -30,8 +29,7 @@
  * Do not add new items to this list. Use the AVCodecID enum instead.
  */
 
-enum CodecID {
-    CODEC_ID_NONE,
+    CODEC_ID_NONE = AV_CODEC_ID_NONE,
 
     /* video codecs */
     CODEC_ID_MPEG1VIDEO,
@@ -395,6 +393,5 @@ enum CodecID {
     CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
                                 * stream (only used by libavformat) */
     CODEC_ID_FFMETADATA = 0x21000,   ///< Dummy codec for streams containing only metadata information.
-} attribute_deprecated;
 
 #endif /* AVCODEC_OLD_CODEC_IDS_H */

libavformat/asfenc.c

@@ -318,7 +318,7 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data
 
     duration = asf->duration + PREROLL_TIME * 10000;
     has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
-    metadata_count = s->metadata ? s->metadata->count : 0;
+    metadata_count = av_dict_count(s->metadata);
 
     bit_rate = 0;
     for(n=0;n<s->nb_streams;n++) {

libavformat/utils.c

@@ -1157,7 +1157,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
 //           presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
 
     /* update flags */
-    if(is_intra_only(st->codec))
+    if (is_intra_only(st->codec))
         pkt->flags |= AV_PKT_FLAG_KEY;
     if (pc)
         pkt->convergence_duration = pc->convergence_duration;
@@ -3802,7 +3802,7 @@ static void print_fps(double d, const char *postfix){
 
 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
 {
-    if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
+    if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
         AVDictionaryEntry *tag=NULL;
 
         av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);

libavutil/dict.c

@@ -23,6 +23,16 @@
 #include "internal.h"
 #include "mem.h"
 
+struct AVDictionary {
+    int count;
+    AVDictionaryEntry *elems;
+};
+
+int av_dict_count(const AVDictionary *m)
+{
+    return m ? m->count : 0;
+}
+
 AVDictionaryEntry *
 av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
 {

libavutil/dict.h

@@ -92,6 +92,14 @@ typedef struct AVDictionary AVDictionary;
 AVDictionaryEntry *
 av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags);
 
+/**
+ * Get number of entries in dictionary.
+ *
+ * @param m dictionary
+ * @return  number of entries in dictionary
+ */
+int av_dict_count(const AVDictionary *m);
+
 /**
  * Set the given entry in *pm, overwriting an existing entry.
  *

libavutil/internal.h

@@ -40,11 +40,6 @@
 #include "cpu.h"
 #include "dict.h"
 
-struct AVDictionary {
-    int count;
-    AVDictionaryEntry *elems;
-};
-
 #ifndef attribute_align_arg
 #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
 #    define attribute_align_arg __attribute__((force_align_arg_pointer))

libavutil/version.h

@@ -39,7 +39,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 51
-#define LIBAVUTIL_VERSION_MINOR 67
+#define LIBAVUTIL_VERSION_MINOR 68
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \