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Code Issues Releases Activity

mpc7/8: decode directly to the user-provided AVFrame

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This commit is contained in:
Justin Ruggles 2012-12-23 19:38:34 -05:00
parent 2c785e250a
commit 3a23752c5a
3 changed files with 10 additions and 17 deletions
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1
libavcodec/mpc.h
View File

@ -50,7 +50,6 @@ typedef struct Band {
}Band;
typedef struct MPCContext {
AVFrame frame;
DSPContext dsp;
MPADSPContext mpadsp;
GetBitContext gb;

11
libavcodec/mpc7.c
View File

@ -139,9 +139,6 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx)
}
vlc_initialized = 1;
avcodec_get_frame_defaults(&c->frame);
avctx->coded_frame = &c->frame;
return 0;
}
@ -201,6 +198,7 @@ static int get_scale_idx(GetBitContext *gb, int ref)
static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size;
MPCContext *c = avctx->priv_data;
@ -230,8 +228,8 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
buf_size -= 4;
/* get output buffer */
c->frame.nb_samples = last_frame ? c->lastframelen : MPC_FRAME_SIZE;
if ((ret = ff_get_buffer(avctx, &c->frame)) < 0) {
frame->nb_samples = last_frame ? c->lastframelen : MPC_FRAME_SIZE;
if ((ret = ff_get_buffer(avctx, frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
@ -295,7 +293,7 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
for(ch = 0; ch < 2; ch++)
idx_to_quant(c, &gb, bands[i].res[ch], c->Q[ch] + off);
ff_mpc_dequantize_and_synth(c, mb, (int16_t **)c->frame.extended_data, 2);
ff_mpc_dequantize_and_synth(c, mb, (int16_t **)frame->extended_data, 2);
bits_used = get_bits_count(&gb);
bits_avail = buf_size * 8;
@ -310,7 +308,6 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
}
*got_frame_ptr = 1;
*(AVFrame *)data = c->frame;
return avpkt->size;
}

11
libavcodec/mpc8.c
View File

@ -230,15 +230,13 @@ static av_cold int mpc8_decode_init(AVCodecContext * avctx)
}
vlc_initialized = 1;
avcodec_get_frame_defaults(&c->frame);
avctx->coded_frame = &c->frame;
return 0;
}
static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
MPCContext *c = avctx->priv_data;
@ -250,8 +248,8 @@ static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
int last[2];
/* get output buffer */
c->frame.nb_samples = MPC_FRAME_SIZE;
if ((res = ff_get_buffer(avctx, &c->frame)) < 0) {
frame->nb_samples = MPC_FRAME_SIZE;
if ((res = ff_get_buffer(avctx, frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return res;
}
@ -407,7 +405,7 @@ static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
}
ff_mpc_dequantize_and_synth(c, maxband - 1,
(int16_t **)c->frame.extended_data,
(int16_t **)frame->extended_data,
avctx->channels);
c->cur_frame++;
@ -419,7 +417,6 @@ static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
c->cur_frame = 0;
*got_frame_ptr = 1;
*(AVFrame *)data = c->frame;
return c->cur_frame ? c->last_bits_used >> 3 : buf_size;
}