*/
#include <vo-amrwbenc/enc_if.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "libavutil/avstring.h"
+#include "libavutil/internal.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
#include "avcodec.h"
+#include "internal.h"
-static const char wb_bitrate_unsupported[] =
- "bitrate not supported: use one of 6.6k, 8.85k, 12.65k, 14.25k, 15.85k, "
- "18.25k, 19.85k, 23.05k, or 23.85k\n";
-
-typedef struct AMRWB_bitrates {
- int rate;
- int mode;
-} AMRWB_bitrates;
+#define MAX_PACKET_SIZE (1 + (477 + 7) / 8)
typedef struct AMRWBContext {
+ AVClass *av_class;
void *state;
int mode;
+ int last_bitrate;
int allow_dtx;
} AMRWBContext;
-static int getWBBitrateMode(int bitrate)
+static const AVOption options[] = {
+ { "dtx", "Allow DTX (generate comfort noise)", offsetof(AMRWBContext, allow_dtx), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL }
+};
+
+static const AVClass class = {
+ "libvo_amrwbenc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
+};
+
+static int get_wb_bitrate_mode(int bitrate, void *log_ctx)
{
/* make the correspondance between bitrate and mode */
- AMRWB_bitrates rates[] = { { 6600, 0},
- { 8850, 1},
- {12650, 2},
- {14250, 3},
- {15850, 4},
- {18250, 5},
- {19850, 6},
- {23050, 7},
- {23850, 8}, };
- int i;
-
+ static const int rates[] = { 6600, 8850, 12650, 14250, 15850, 18250,
+ 19850, 23050, 23850 };
+ int i, best = -1, min_diff = 0;
+ char log_buf[200];
+
+ for (i = 0; i < 9; i++) {
+ if (rates[i] == bitrate)
+ return i;
+ if (best < 0 || abs(rates[i] - bitrate) < min_diff) {
+ best = i;
+ min_diff = abs(rates[i] - bitrate);
+ }
+ }
+ /* no bitrate matching exactly, log a warning */
+ snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
for (i = 0; i < 9; i++)
- if (rates[i].rate == bitrate)
- return rates[i].mode;
- /* no bitrate matching, return an error */
- return -1;
+ av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i] / 1000.f);
+ av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best] / 1000.f);
+ av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
+
+ return best;
}
static av_cold int amr_wb_encode_init(AVCodecContext *avctx)
return AVERROR(ENOSYS);
}
- if ((s->mode = getWBBitrateMode(avctx->bit_rate)) < 0) {
- av_log(avctx, AV_LOG_ERROR, wb_bitrate_unsupported);
- return AVERROR(ENOSYS);
- }
+ s->mode = get_wb_bitrate_mode(avctx->bit_rate, avctx);
+ s->last_bitrate = avctx->bit_rate;
avctx->frame_size = 320;
+ avctx->delay = 80;
+#if FF_API_OLD_ENCODE_AUDIO
avctx->coded_frame = avcodec_alloc_frame();
+ if (!avctx->coded_frame)
+ return AVERROR(ENOMEM);
+#endif
s->state = E_IF_init();
- s->allow_dtx = 0;
return 0;
}
return 0;
}
-static int amr_wb_encode_frame(AVCodecContext *avctx,
- unsigned char *frame/*out*/,
- int buf_size, void *data/*in*/)
+static int amr_wb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr)
{
AMRWBContext *s = avctx->priv_data;
- int size;
+ const int16_t *samples = (const int16_t *)frame->data[0];
+ int size, ret;
- if ((s->mode = getWBBitrateMode(avctx->bit_rate)) < 0) {
- av_log(avctx, AV_LOG_ERROR, wb_bitrate_unsupported);
- return AVERROR(ENOSYS);
+ if ((ret = ff_alloc_packet(avpkt, MAX_PACKET_SIZE))) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+ return ret;
+ }
+
+ if (s->last_bitrate != avctx->bit_rate) {
+ s->mode = get_wb_bitrate_mode(avctx->bit_rate, avctx);
+ s->last_bitrate = avctx->bit_rate;
+ }
+ size = E_IF_encode(s->state, s->mode, samples, avpkt->data, s->allow_dtx);
+ if (size <= 0 || size > MAX_PACKET_SIZE) {
+ av_log(avctx, AV_LOG_ERROR, "Error encoding frame\n");
+ return AVERROR(EINVAL);
}
- size = E_IF_encode(s->state, s->mode, data, frame, s->allow_dtx);
- return size;
+
+ if (frame->pts != AV_NOPTS_VALUE)
+ avpkt->pts = frame->pts - ff_samples_to_time_base(avctx, avctx->delay);
+
+ avpkt->size = size;
+ *got_packet_ptr = 1;
+ return 0;
}
AVCodec ff_libvo_amrwbenc_encoder = {
- "libvo_amrwbenc",
- CODEC_TYPE_AUDIO,
- CODEC_ID_AMR_WB,
- sizeof(AMRWBContext),
- amr_wb_encode_init,
- amr_wb_encode_frame,
- amr_wb_encode_close,
- NULL,
- .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("libvo-amrwbenc Adaptive Multi-Rate "
- "(AMR) Wide-Band"),
+ .name = "libvo_amrwbenc",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_AMR_WB,
+ .priv_data_size = sizeof(AMRWBContext),
+ .init = amr_wb_encode_init,
+ .encode2 = amr_wb_encode_frame,
+ .close = amr_wb_encode_close,
+ .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+ AV_SAMPLE_FMT_NONE },
+ .long_name = NULL_IF_CONFIG_SMALL("Android VisualOn AMR-WB "
+ "(Adaptive Multi-Rate Wide-Band)"),
+ .priv_class = &class,
};
-
projects / ffmpeg / blobdiff