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ra144enc: fix end-of-stream handling

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Use CODEC_CAP_DELAY and CODEC_CAP_SMALL_LAST_FRAME to properly pad and flush
the encoder at the end of encoding. This is needed in order to have all input
samples decoded.
This commit is contained in:
Justin Ruggles 2012-02-28 01:02:28 -05:00
parent 29e2c85310
commit b0350c1c30
2 changed files with 26 additions and 8 deletions
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1
libavcodec/ra144.h
View File

@ -36,6 +36,7 @@ typedef struct {
AVCodecContext *avctx;
AVFrame frame;
LPCContext lpc_ctx;
int last_frame;
unsigned int old_energy; ///< previous frame energy

33
libavcodec/ra144enc.c
View File

@ -53,6 +53,7 @@ static av_cold int ra144_encode_init(AVCodecContext * avctx)
return -1;
}
avctx->frame_size = NBLOCKS * BLOCKSIZE;
avctx->delay = avctx->frame_size;
avctx->bit_rate = 8000;
ractx = avctx->priv_data;
ractx->lpc_coef[0] = ractx->lpc_tables[0];
@ -433,7 +434,7 @@ static int ra144_encode_frame(AVCodecContext *avctx, uint8_t *frame,
{
static const uint8_t sizes[LPC_ORDER] = {64, 32, 32, 16, 16, 8, 8, 8, 8, 4};
static const uint8_t bit_sizes[LPC_ORDER] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2};
RA144Context *ractx;
RA144Context *ractx = avctx->priv_data;
PutBitContext pb;
int32_t lpc_data[NBLOCKS * BLOCKSIZE];
int32_t lpc_coefs[LPC_ORDER][MAX_LPC_ORDER];
@ -445,11 +446,13 @@ static int ra144_encode_frame(AVCodecContext *avctx, uint8_t *frame,
int energy = 0;
int i, idx;
if (ractx->last_frame)
return 0;
if (buf_size < FRAMESIZE) {
av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
return 0;
}
ractx = avctx->priv_data;
/**
* Since the LPC coefficients are calculated on a frame centered over the
@ -462,11 +465,15 @@ static int ra144_encode_frame(AVCodecContext *avctx, uint8_t *frame,
lpc_data[i] = ractx->curr_block[BLOCKSIZE + BLOCKSIZE / 2 + i];
energy += (lpc_data[i] * lpc_data[i]) >> 4;
}
for (i = 2 * BLOCKSIZE + BLOCKSIZE / 2; i < NBLOCKS * BLOCKSIZE; i++) {
lpc_data[i] = *((int16_t *)data + i - 2 * BLOCKSIZE - BLOCKSIZE / 2) >>
2;
energy += (lpc_data[i] * lpc_data[i]) >> 4;
if (data) {
int j;
for (j = 0; j < avctx->frame_size && i < NBLOCKS * BLOCKSIZE; i++, j++) {
lpc_data[i] = samples[j] >> 2;
energy += (lpc_data[i] * lpc_data[i]) >> 4;
}
}
if (i < NBLOCKS * BLOCKSIZE)
memset(&lpc_data[i], 0, (NBLOCKS * BLOCKSIZE - i) * sizeof(*lpc_data));
energy = ff_energy_tab[quantize(ff_t_sqrt(energy >> 5) >> 10, ff_energy_tab,
32)];
@ -515,8 +522,17 @@ static int ra144_encode_frame(AVCodecContext *avctx, uint8_t *frame,
ractx->old_energy = energy;
ractx->lpc_refl_rms[1] = ractx->lpc_refl_rms[0];
FFSWAP(unsigned int *, ractx->lpc_coef[0], ractx->lpc_coef[1]);
for (i = 0; i < NBLOCKS * BLOCKSIZE; i++)
ractx->curr_block[i] = samples[i] >> 2;
/* copy input samples to current block for processing in next call */
i = 0;
if (data) {
for (; i < avctx->frame_size; i++)
ractx->curr_block[i] = samples[i] >> 2;
} else
ractx->last_frame = 1;
memset(&ractx->curr_block[i], 0,
(NBLOCKS * BLOCKSIZE - i) * sizeof(*ractx->curr_block));
return FRAMESIZE;
}
@ -529,6 +545,7 @@ AVCodec ff_ra_144_encoder = {
.init = ra144_encode_init,
.encode = ra144_encode_frame,
.close = ra144_encode_close,
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"),