libaac+ support

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

3 files changed, 138 insertions, 0 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 211c6b5382..5a601fb09d 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -579,6 +579,7 @@ OBJS-$(CONFIG_WEBM_MUXER)              += xiph.o mpeg4audio.o \
 OBJS-$(CONFIG_WTV_DEMUXER)             += mpeg4audio.o mpegaudiodata.o
 
 # external codec libraries
+OBJS-$(CONFIG_LIBAACPLUS_ENCODER)         += libaacplus.o
 OBJS-$(CONFIG_LIBCELT_DECODER)            += libcelt_dec.o
 OBJS-$(CONFIG_LIBDIRAC_DECODER)           += libdiracdec.o
 OBJS-$(CONFIG_LIBDIRAC_ENCODER)           += libdiracenc.o libdirac_libschro.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 6522127d26..0fcf857e5c 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -374,6 +374,7 @@ void avcodec_register_all(void)
     REGISTER_ENCDEC  (XSUB, xsub);
 
     /* external libraries */
+    REGISTER_ENCODER (LIBAACPLUS, libaacplus);
     REGISTER_DECODER (LIBCELT, libcelt);
     REGISTER_ENCDEC  (LIBDIRAC, libdirac);
     REGISTER_ENCODER (LIBFAAC, libfaac);
diff --git a/libavcodec/libaacplus.c b/libavcodec/libaacplus.c
new file mode 100644
index 0000000000..c8c87be549
--- /dev/null
+++ b/libavcodec/libaacplus.c
@@ -0,0 +1,136 @@
+/*
+ * Interface to libaacplus for aac+ (sbr+ps) encoding
+ * Copyright (c) 2010 tipok <piratfm@gmail.com>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * Interface to libaacplus for aac+ (sbr+ps) encoding.
+ */
+
+#include "avcodec.h"
+#include <aacplus.h>
+
+typedef struct aacPlusAudioContext {
+    aacplusEncHandle aacplus_handle;
+} aacPlusAudioContext;
+
+static av_cold int aacPlus_encode_init(AVCodecContext *avctx)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+    aacplusEncConfiguration *aacplus_cfg;
+    unsigned long samples_input, max_bytes_output;
+
+    /* number of channels */
+    if (avctx->channels < 1 || avctx->channels > 2) {
+        av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels);
+        return -1;
+    }
+
+    s->aacplus_handle = aacplusEncOpen(avctx->sample_rate,
+                                 avctx->channels,
+                                 &samples_input, &max_bytes_output);
+    if(!s->aacplus_handle) {
+            av_log(avctx, AV_LOG_ERROR, "can't open encoder\n");
+            return -1;
+    }
+
+    /* check aacplus version */
+    aacplus_cfg = aacplusEncGetCurrentConfiguration(s->aacplus_handle);
+
+    /* put the options in the configuration struct */
+    if(avctx->profile != FF_PROFILE_AAC_LOW && avctx->profile != FF_PROFILE_UNKNOWN) {
+            av_log(avctx, AV_LOG_ERROR, "invalid AAC profile: %d, only LC supported\n", avctx->profile);
+            aacplusEncClose(s->aacplus_handle);
+            return -1;
+    }
+
+    aacplus_cfg->bitRate = avctx->bit_rate;
+    aacplus_cfg->bandWidth = avctx->cutoff;
+    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
+        aacplus_cfg->outputFormat = 0; //raw aac
+    }
+    aacplus_cfg->inputFormat = AACPLUS_INPUT_16BIT;
+    if (!aacplusEncSetConfiguration(s->aacplus_handle, aacplus_cfg)) {
+        av_log(avctx, AV_LOG_ERROR, "libaacplus doesn't support this output format!\n");
+        return -1;
+    }
+
+    avctx->frame_size = samples_input / avctx->channels;
+
+    avctx->coded_frame= avcodec_alloc_frame();
+    avctx->coded_frame->key_frame= 1;
+
+    /* Set decoder specific info */
+    avctx->extradata_size = 0;
+    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
+
+        unsigned char *buffer = NULL;
+        unsigned long decoder_specific_info_size;
+
+        if (aacplusEncGetDecoderSpecificInfo(s->aacplus_handle, &buffer,
+                                           &decoder_specific_info_size) == 1) {
+            avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE);
+            avctx->extradata_size = decoder_specific_info_size;
+            memcpy(avctx->extradata, buffer, avctx->extradata_size);
+        }
+#undef free
+        free(buffer);
+#define free please_use_av_free
+    }
+    return 0;
+}
+
+static int aacPlus_encode_frame(AVCodecContext *avctx,
+                             unsigned char *frame, int buf_size, void *data)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+    int bytes_written;
+
+    bytes_written = aacplusEncEncode(s->aacplus_handle,
+                                  data,
+                                  avctx->frame_size * avctx->channels,
+                                  frame,
+                                  buf_size);
+
+    return bytes_written;
+}
+
+static av_cold int aacPlus_encode_close(AVCodecContext *avctx)
+{
+    aacPlusAudioContext *s = avctx->priv_data;
+
+    av_freep(&avctx->coded_frame);
+    av_freep(&avctx->extradata);
+
+    aacplusEncClose(s->aacplus_handle);
+    return 0;
+}
+
+AVCodec ff_libaacplus_encoder = {
+    "libaacplus",
+    AVMEDIA_TYPE_AUDIO,
+    CODEC_ID_AAC,
+    sizeof(aacPlusAudioContext),
+    aacPlus_encode_init,
+    aacPlus_encode_frame,
+    aacPlus_encode_close,
+    .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"),
+};