* MPEG-4 Audio common header
* Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define AVCODEC_MPEG4AUDIO_H
#include <stdint.h>
+
+#include "libavutil/attributes.h"
+
#include "get_bits.h"
+#include "internal.h"
#include "put_bits.h"
-typedef struct {
+typedef struct MPEG4AudioConfig {
int object_type;
int sampling_index;
int sample_rate;
int chan_config;
- int sbr; //< -1 implicit, 1 presence
+ int sbr; ///< -1 implicit, 1 presence
int ext_object_type;
int ext_sampling_index;
int ext_sample_rate;
int ext_chan_config;
+ int channels;
+ int ps; ///< -1 implicit, 1 presence
+ int frame_length_short;
} MPEG4AudioConfig;
-extern const int ff_mpeg4audio_sample_rates[16];
+extern av_export_avcodec const int avpriv_mpeg4audio_sample_rates[16];
extern const uint8_t ff_mpeg4audio_channels[8];
+
/**
* Parse MPEG-4 systems extradata to retrieve audio configuration.
* @param[in] c MPEG4AudioConfig structure to fill.
* @param[in] buf Extradata from container.
- * @param[in] buf_size Extradata size.
+ * @param[in] bit_size Extradata size in bits.
+ * @param[in] sync_extension look for a sync extension after config if true.
* @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
*/
-int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size);
+int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf,
+ int bit_size, int sync_extension);
enum AudioObjectType {
AOT_NULL,
AOT_AAC_MAIN, ///< Y Main
AOT_AAC_LC, ///< Y Low Complexity
AOT_AAC_SSR, ///< N (code in SoC repo) Scalable Sample Rate
- AOT_AAC_LTP, ///< N (code in SoC repo) Long Term Prediction
- AOT_SBR, ///< N (in progress) Spectral Band Replication
+ AOT_AAC_LTP, ///< Y Long Term Prediction
+ AOT_SBR, ///< Y Spectral Band Replication
AOT_AAC_SCALABLE, ///< N Scalable
AOT_TWINVQ, ///< N Twin Vector Quantizer
AOT_CELP, ///< N Code Excited Linear Prediction
AOT_L2, ///< Y Layer 2
AOT_L3, ///< Y Layer 3
AOT_DST, ///< N Direct Stream Transfer
- AOT_ALS, ///< N Audio LosslesS
+ AOT_ALS, ///< Y Audio LosslesS
AOT_SLS, ///< N Scalable LosslesS
AOT_SLS_NON_CORE, ///< N Scalable LosslesS (non core)
AOT_ER_AAC_ELD, ///< N Error Resilient Enhanced Low Delay
AOT_USAC_NOSBR, ///< N Unified Speech and Audio Coding (no SBR)
AOT_SAOC, ///< N Spatial Audio Object Coding
AOT_LD_SURROUND, ///< N Low Delay MPEG Surround
- AOT_USAC = 45, ///< N Unified Speech and Audio Coding
+ AOT_USAC, ///< N Unified Speech and Audio Coding
};
#define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE
///<marker and the comment
-int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb);
+static av_always_inline unsigned int ff_pce_copy_bits(PutBitContext *pb,
+ GetBitContext *gb,
+ int bits)
+{
+ unsigned int el = get_bits(gb, bits);
+ put_bits(pb, bits, el);
+ return el;
+}
+
+static inline int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
+{
+ int five_bit_ch, four_bit_ch, comment_size, bits;
+ int offset = put_bits_count(pb);
+
+ ff_pce_copy_bits(pb, gb, 10); // Tag, Object Type, Frequency
+ five_bit_ch = ff_pce_copy_bits(pb, gb, 4); // Front
+ five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Side
+ five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Back
+ four_bit_ch = ff_pce_copy_bits(pb, gb, 2); // LFE
+ four_bit_ch += ff_pce_copy_bits(pb, gb, 3); // Data
+ five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Coupling
+ if (ff_pce_copy_bits(pb, gb, 1)) // Mono Mixdown
+ ff_pce_copy_bits(pb, gb, 4);
+ if (ff_pce_copy_bits(pb, gb, 1)) // Stereo Mixdown
+ ff_pce_copy_bits(pb, gb, 4);
+ if (ff_pce_copy_bits(pb, gb, 1)) // Matrix Mixdown
+ ff_pce_copy_bits(pb, gb, 3);
+ for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16)
+ ff_pce_copy_bits(pb, gb, 16);
+ if (bits)
+ ff_pce_copy_bits(pb, gb, bits);
+ avpriv_align_put_bits(pb);
+ align_get_bits(gb);
+ comment_size = ff_pce_copy_bits(pb, gb, 8);
+ for (; comment_size > 0; comment_size--)
+ ff_pce_copy_bits(pb, gb, 8);
+
+ return put_bits_count(pb) - offset;
+}
#endif /* AVCODEC_MPEG4AUDIO_H */