aacenc: cosmetics: move init() and end() to the bottom of the file.

[ffmpeg] / libavcodec / g726.c

diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index f58bc98dadb169e1d6bfd2135e1d34e502a85d8e..85711f854c9d2b302cd2400cf995bf2cc48dcd9a 100644 (file)
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -23,7 +23,9 @@
  */
 #include <limits.h>
 #include "libavutil/avassert.h"
+#include "libavutil/opt.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "get_bits.h"
 #include "put_bits.h"
 
@@ -72,6 +74,8 @@ typedef struct G726Tables {
 } G726Tables;
 
 typedef struct G726Context {
+    AVClass *class;
+    AVFrame frame;
     G726Tables tbls;    /**< static tables needed for computation */
 
     Float11 sr[2];      /**< prev. reconstructed samples */
@@ -267,11 +271,11 @@ static int16_t g726_decode(G726Context* c, int I)
     return av_clip(re_signal << 2, -0xffff, 0xffff);
 }
 
-static av_cold int g726_reset(G726Context* c, int index)
+static av_cold int g726_reset(G726Context *c)
 {
     int i;
 
-    c->tbls = G726Tables_pool[index];
+    c->tbls = G726Tables_pool[c->code_size - 2];
     for (i=0; i<2; i++) {
         c->sr[i].mant = 1<<5;
         c->pk[i] = 1;
@@ -317,18 +321,14 @@ static av_cold int g726_encode_init(AVCodecContext *avctx)
         return AVERROR(EINVAL);
     }
 
-    if (avctx->bit_rate % avctx->sample_rate) {
-        av_log(avctx, AV_LOG_ERROR, "Bitrate - Samplerate combination is invalid\n");
-        return AVERROR(EINVAL);
-    }
-    c->code_size = (avctx->bit_rate + avctx->sample_rate/2) / avctx->sample_rate;
-    if (c->code_size < 2 || c->code_size > 5) {
-        av_log(avctx, AV_LOG_ERROR, "Invalid number of bits %d\n", c->code_size);
-        return AVERROR(EINVAL);
-    }
+    if (avctx->bit_rate)
+        c->code_size = (avctx->bit_rate + avctx->sample_rate/2) / avctx->sample_rate;
+
+    c->code_size = av_clip(c->code_size, 2, 5);
+    avctx->bit_rate = c->code_size * avctx->sample_rate;
     avctx->bits_per_coded_sample = c->code_size;
 
-    g726_reset(c, c->code_size - 2);
+    g726_reset(c);
 
     avctx->coded_frame = avcodec_alloc_frame();
     if (!avctx->coded_frame)
@@ -365,8 +365,43 @@ static int g726_encode_frame(AVCodecContext *avctx,
 
     return put_bits_count(&pb)>>3;
 }
+
+#define OFFSET(x) offsetof(G726Context, x)
+#define AE AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "code_size", "Bits per code", OFFSET(code_size), AV_OPT_TYPE_INT, { 4 }, 2, 5, AE },
+    { NULL },
+};
+
+static const AVClass class = {
+    .class_name = "g726",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault defaults[] = {
+    { "b", "0" },
+    { NULL },
+};
+
+AVCodec ff_adpcm_g726_encoder = {
+    .name           = "g726",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_ADPCM_G726,
+    .priv_data_size = sizeof(G726Context),
+    .init           = g726_encode_init,
+    .encode         = g726_encode_frame,
+    .close          = g726_encode_close,
+    .capabilities = CODEC_CAP_SMALL_LAST_FRAME,
+    .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM"),
+    .priv_class     = &class,
+    .defaults       = defaults,
+};
 #endif
 
+#if CONFIG_ADPCM_G726_DECODER
 static av_cold int g726_decode_init(AVCodecContext *avctx)
 {
     G726Context* c = avctx->priv_data;
@@ -389,30 +424,35 @@ static av_cold int g726_decode_init(AVCodecContext *avctx)
         av_log(avctx, AV_LOG_ERROR, "Invalid number of bits %d\n", c->code_size);
         return AVERROR(EINVAL);
     }
-    g726_reset(c, c->code_size - 2);
+    g726_reset(c);
 
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;
 
+    avcodec_get_frame_defaults(&c->frame);
+    avctx->coded_frame = &c->frame;
+
     return 0;
 }
 
-static int g726_decode_frame(AVCodecContext *avctx,
-                             void *data, int *data_size,
-                             AVPacket *avpkt)
+static int g726_decode_frame(AVCodecContext *avctx, void *data,
+                             int *got_frame_ptr, AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     G726Context *c = avctx->priv_data;
-    int16_t *samples = data;
+    int16_t *samples;
     GetBitContext gb;
-    int out_samples, out_size;
+    int out_samples, ret;
 
     out_samples = buf_size * 8 / c->code_size;
-    out_size    = out_samples * av_get_bytes_per_sample(avctx->sample_fmt);
-    if (*data_size < out_size) {
-        av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
-        return AVERROR(EINVAL);
+
+    /* get output buffer */
+    c->frame.nb_samples = out_samples;
+    if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
     }
+    samples = (int16_t *)c->frame.data[0];
 
     init_get_bits(&gb, buf, buf_size * 8);
 
@@ -422,24 +462,17 @@ static int g726_decode_frame(AVCodecContext *avctx,
     if (get_bits_left(&gb) > 0)
         av_log(avctx, AV_LOG_ERROR, "Frame invalidly split, missing parser?\n");
 
-    *data_size = out_size;
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = c->frame;
+
     return buf_size;
 }
 
-#if CONFIG_ADPCM_G726_ENCODER
-AVCodec ff_adpcm_g726_encoder = {
-    .name           = "g726",
-    .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = CODEC_ID_ADPCM_G726,
-    .priv_data_size = sizeof(G726Context),
-    .init           = g726_encode_init,
-    .encode         = g726_encode_frame,
-    .close          = g726_encode_close,
-    .capabilities = CODEC_CAP_SMALL_LAST_FRAME,
-    .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
-    .long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM"),
-};
-#endif
+static void g726_decode_flush(AVCodecContext *avctx)
+{
+    G726Context *c = avctx->priv_data;
+    g726_reset(c);
+}
 
 AVCodec ff_adpcm_g726_decoder = {
     .name           = "g726",
@@ -448,5 +481,8 @@ AVCodec ff_adpcm_g726_decoder = {
     .priv_data_size = sizeof(G726Context),
     .init           = g726_decode_init,
     .decode         = g726_decode_frame,
+    .flush          = g726_decode_flush,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM"),
 };
+#endif