Add an AAC encoder by using the libvo-aacenc library

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 128 insertions, 0 deletions

diff --git a/libavcodec/libvo-aacenc.c b/libavcodec/libvo-aacenc.c
new file mode 100644
index 0000000000..65c2745695
--- /dev/null
+++ b/libavcodec/libvo-aacenc.c
@@ -0,0 +1,128 @@
+/*
+ * AAC encoder wrapper
+ * Copyright (c) 2010 Martin Storsjo
+ *
+ * This file is part of Libav.
+ *
+ * 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.
+ *
+ * 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <vo-aacenc/voAAC.h>
+#include <vo-aacenc/cmnMemory.h>
+
+#include "avcodec.h"
+#include "mpeg4audio.h"
+
+typedef struct AACContext {
+    VO_AUDIO_CODECAPI codec_api;
+    VO_HANDLE handle;
+    VO_MEM_OPERATOR mem_operator;
+    VO_CODEC_INIT_USERDATA user_data;
+} AACContext;
+
+static av_cold int aac_encode_init(AVCodecContext *avctx)
+{
+    AACContext *s = avctx->priv_data;
+    AACENC_PARAM params = { 0 };
+    int index;
+
+    avctx->coded_frame = avcodec_alloc_frame();
+    avctx->frame_size = 1024;
+
+    voGetAACEncAPI(&s->codec_api);
+
+    s->mem_operator.Alloc = cmnMemAlloc;
+    s->mem_operator.Copy = cmnMemCopy;
+    s->mem_operator.Free = cmnMemFree;
+    s->mem_operator.Set = cmnMemSet;
+    s->mem_operator.Check = cmnMemCheck;
+    s->user_data.memflag = VO_IMF_USERMEMOPERATOR;
+    s->user_data.memData = &s->mem_operator;
+    s->codec_api.Init(&s->handle, VO_AUDIO_CodingAAC, &s->user_data);
+
+    params.sampleRate = avctx->sample_rate;
+    params.bitRate    = avctx->bit_rate;
+    params.nChannels  = avctx->channels;
+    params.adtsUsed   = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER);
+    if (s->codec_api.SetParam(s->handle, VO_PID_AAC_ENCPARAM, &params)
+        != VO_ERR_NONE) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to set encoding parameters\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    avctx->extradata_size = 2;
+    avctx->extradata      = av_mallocz(avctx->extradata_size +
+                                       FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!avctx->extradata)
+        return AVERROR(ENOMEM);
+
+    for (index = 0; index < 16; index++)
+        if (avctx->sample_rate == ff_mpeg4audio_sample_rates[index])
+            break;
+    if (index == 16) {
+        av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n",
+                                    avctx->sample_rate);
+        return AVERROR_NOTSUPP;
+    }
+    avctx->extradata[0] = 0x02 << 3 | index >> 1;
+    avctx->extradata[1] = (index & 0x01) << 7 | avctx->channels << 3;
+    return 0;
+}
+
+static int aac_encode_close(AVCodecContext *avctx)
+{
+    AACContext *s = avctx->priv_data;
+
+    s->codec_api.Uninit(s->handle);
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+static int aac_encode_frame(AVCodecContext *avctx,
+                            unsigned char *frame/*out*/,
+                            int buf_size, void *data/*in*/)
+{
+    AACContext *s = avctx->priv_data;
+    VO_CODECBUFFER input = { 0 }, output = { 0 };
+    VO_AUDIO_OUTPUTINFO output_info = { { 0 } };
+
+    input.Buffer = data;
+    input.Length = 2 * avctx->channels * avctx->frame_size;
+    output.Buffer = frame;
+    output.Length = buf_size;
+
+    s->codec_api.SetInputData(s->handle, &input);
+    if (s->codec_api.GetOutputData(s->handle, &output, &output_info)
+        != VO_ERR_NONE) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to encode frame\n");
+        return AVERROR_UNKNOWN;
+    }
+    return output.Length;
+}
+
+AVCodec ff_libvo_aacenc_encoder = {
+    "libvo_aacenc",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_AAC,
+    sizeof(AACContext),
+    aac_encode_init,
+    aac_encode_frame,
+    aac_encode_close,
+    NULL,
+    .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("libvo-aacenc AAC"),
+};
+