Merge the AAC encoder from SoC svn. It is still considered experimental.

Originally committed as revision 19375 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 71 insertions, 0 deletions

diff --git a/libavcodec/aacenc.h b/libavcodec/aacenc.h
new file mode 100644
index 0000000000..458d3d5d99
--- /dev/null
+++ b/libavcodec/aacenc.h
@@ -0,0 +1,71 @@
+/*
+ * AAC encoder
+ * Copyright (C) 2008 Konstantin Shishkov
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AACENC_H
+#define AVCODEC_AACENC_H
+
+#include "avcodec.h"
+#include "put_bits.h"
+#include "dsputil.h"
+
+#include "aac.h"
+
+#include "psymodel.h"
+
+struct AACEncContext;
+
+typedef struct AACCoefficientsEncoder{
+    void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
+                                  SingleChannelElement *sce, const float lambda);
+    void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
+                                     int win, int group_len, const float lambda);
+    void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
+                                     int scale_idx, int cb, const float lambda);
+    void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
+}AACCoefficientsEncoder;
+
+extern AACCoefficientsEncoder ff_aac_coders[];
+
+/**
+ * AAC encoder context
+ */
+typedef struct AACEncContext {
+    PutBitContext pb;
+    MDCTContext mdct1024;                        ///< long (1024 samples) frame transform context
+    MDCTContext mdct128;                         ///< short (128 samples) frame transform context
+    DSPContext  dsp;
+    DECLARE_ALIGNED_16(FFTSample, output[2048]); ///< temporary buffer for MDCT input coefficients
+    int16_t* samples;                            ///< saved preprocessed input
+
+    int samplerate_index;                        ///< MPEG-4 samplerate index
+
+    ChannelElement *cpe;                         ///< channel elements
+    FFPsyContext psy;
+    struct FFPsyPreprocessContext* psypp;
+    AACCoefficientsEncoder *coder;
+    int cur_channel;
+    int last_frame;
+    float lambda;
+    DECLARE_ALIGNED_16(int,   qcoefs[96][2]);    ///< quantized coefficients
+    DECLARE_ALIGNED_16(float, scoefs[1024]);     ///< scaled coefficients
+} AACEncContext;
+
+#endif /* AVCODEC_AACENC_H */