Declare AC-3 parser dependency of AC-3 decoder and EAC-3 demuxer in configure.

[ffmpeg] / libavcodec / flac.h

diff --git a/libavcodec/flac.h b/libavcodec/flac.h
index e7a8440b12a21444e67633978c372d615a8c424c..25494ed6672858cea9e5a9e6cf21e5d2eacc4cd2 100644 (file)
--- a/libavcodec/flac.h
+++ b/libavcodec/flac.h
@@ -20,23 +20,104 @@
  */
 
 /**
- * @file flac.h
+ * @file libavcodec/flac.h
  * FLAC (Free Lossless Audio Codec) decoder/demuxer common functions
  */
 
-#ifndef FFMPEG_FLAC_H
-#define FFMPEG_FLAC_H
+#ifndef AVCODEC_FLAC_H
+#define AVCODEC_FLAC_H
+
+#include "avcodec.h"
+
+#define FLAC_STREAMINFO_SIZE   34
+#define FLAC_MAX_CHANNELS       8
+#define FLAC_MIN_BLOCKSIZE     16
+#define FLAC_MAX_BLOCKSIZE  65535
+
+enum {
+    FLAC_CHMODE_INDEPENDENT =  0,
+    FLAC_CHMODE_LEFT_SIDE   =  8,
+    FLAC_CHMODE_RIGHT_SIDE  =  9,
+    FLAC_CHMODE_MID_SIDE    = 10,
+};
+
+enum {
+    FLAC_METADATA_TYPE_STREAMINFO = 0,
+    FLAC_METADATA_TYPE_PADDING,
+    FLAC_METADATA_TYPE_APPLICATION,
+    FLAC_METADATA_TYPE_SEEKTABLE,
+    FLAC_METADATA_TYPE_VORBIS_COMMENT,
+    FLAC_METADATA_TYPE_CUESHEET,
+    FLAC_METADATA_TYPE_PICTURE,
+    FLAC_METADATA_TYPE_INVALID = 127
+};
+
+enum FLACExtradataFormat {
+    FLAC_EXTRADATA_FORMAT_STREAMINFO  = 0,
+    FLAC_EXTRADATA_FORMAT_FULL_HEADER = 1
+};
+
+#define FLACCOMMONINFO \
+    int samplerate;         /**< sample rate                             */\
+    int channels;           /**< number of channels                      */\
+    int bps;                /**< bits-per-sample                         */\
 
 /**
  * Data needed from the Streaminfo header for use by the raw FLAC demuxer
  * and/or the FLAC decoder.
  */
 #define FLACSTREAMINFO \
-    int min_blocksize;      /**< minimum block size, in samples          */\
+    FLACCOMMONINFO \
     int max_blocksize;      /**< maximum block size, in samples          */\
     int max_framesize;      /**< maximum frame size, in bytes            */\
-    int samplerate;         /**< sample rate                             */\
-    int channels;           /**< number of channels                      */\
-    int bps;                /**< bits-per-sample                         */\
+    int64_t samples;        /**< total number of samples                 */\
+
+typedef struct FLACStreaminfo {
+    FLACSTREAMINFO
+} FLACStreaminfo;
+
+typedef struct FLACFrameInfo {
+    FLACCOMMONINFO
+    int blocksize;          /**< block size of the frame                 */
+    int ch_mode;            /**< channel decorrelation mode              */
+} FLACFrameInfo;
+
+/**
+ * Parse the Streaminfo metadata block
+ * @param[out] avctx   codec context to set basic stream parameters
+ * @param[out] s       where parsed information is stored
+ * @param[in]  buffer  pointer to start of 34-byte streaminfo data
+ */
+void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
+                              const uint8_t *buffer);
+
+/**
+ * Validate the FLAC extradata.
+ * @param[in]  avctx codec context containing the extradata.
+ * @param[out] format extradata format.
+ * @param[out] streaminfo_start pointer to start of 34-byte STREAMINFO data.
+ * @return 1 if valid, 0 if not valid.
+ */
+int ff_flac_is_extradata_valid(AVCodecContext *avctx,
+                               enum FLACExtradataFormat *format,
+                               uint8_t **streaminfo_start);
+
+/**
+ * Parse the metadata block parameters from the header.
+ * @param[in]  block_header header data, at least 4 bytes
+ * @param[out] last indicator for last metadata block
+ * @param[out] type metadata block type
+ * @param[out] size metadata block size
+ */
+void ff_flac_parse_block_header(const uint8_t *block_header,
+                                int *last, int *type, int *size);
+
+/**
+ * Calculate an estimate for the maximum frame size based on verbatim mode.
+ * @param blocksize block size, in samples
+ * @param ch number of channels
+ * @param bps bits-per-sample
+ */
+int ff_flac_get_max_frame_size(int blocksize, int ch, int bps);
 
-#endif /* FFMPEG_FLAC_H */
+#endif /* AVCODEC_FLAC_H */