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authorMichael Niedermayer <michaelni@gmx.at>2013-04-05 22:00:38 +0200
committerMichael Niedermayer <michaelni@gmx.at>2013-04-05 22:00:38 +0200
commit473d1297427fff8cd00b08ce054e80a262efc6eb (patch)
tree96d18e2e0f83879bc53c35b320ac26eb5eee2374 /libavcodec/h261enc.c
parent04b0fd7e91b9a4f5e58744a61d8993bb7898b13b (diff)
parent0404ec619d43f27b87c424aa1a572a6699fe6a31 (diff)
downloadffmpeg-473d1297427fff8cd00b08ce054e80a262efc6eb.tar.gz
Merge commit '0404ec619d43f27b87c424aa1a572a6699fe6a31'
* commit '0404ec619d43f27b87c424aa1a572a6699fe6a31': h261: cosmetics: Move functions to avoid forward declarations Conflicts: libavcodec/h261dec.c libavcodec/h261enc.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/h261enc.c')
-rw-r--r--libavcodec/h261enc.c149
1 files changed, 73 insertions, 76 deletions
diff --git a/libavcodec/h261enc.c b/libavcodec/h261enc.c
index 386e200003..bfdb3e68b6 100644
--- a/libavcodec/h261enc.c
+++ b/libavcodec/h261enc.c
@@ -32,9 +32,6 @@
#include "h261.h"
#include "h261data.h"
-static void h261_encode_block(H261Context *h, int16_t *block,
- int n);
-
int ff_h261_get_picture_format(int width, int height)
{
// QCIF
@@ -156,6 +153,79 @@ static inline int get_cbp(MpegEncContext *s, int16_t block[6][64])
return cbp;
}
+/**
+ * Encode an 8x8 block.
+ * @param block the 8x8 block
+ * @param n block index (0-3 are luma, 4-5 are chroma)
+ */
+static void h261_encode_block(H261Context *h, int16_t *block, int n)
+{
+ MpegEncContext *const s = &h->s;
+ int level, run, i, j, last_index, last_non_zero, sign, slevel, code;
+ RLTable *rl;
+
+ rl = &ff_h261_rl_tcoeff;
+ if (s->mb_intra) {
+ /* DC coef */
+ level = block[0];
+ /* 255 cannot be represented, so we clamp */
+ if (level > 254) {
+ level = 254;
+ block[0] = 254;
+ }
+ /* 0 cannot be represented also */
+ else if (level < 1) {
+ level = 1;
+ block[0] = 1;
+ }
+ if (level == 128)
+ put_bits(&s->pb, 8, 0xff);
+ else
+ put_bits(&s->pb, 8, level);
+ i = 1;
+ } else if ((block[0] == 1 || block[0] == -1) &&
+ (s->block_last_index[n] > -1)) {
+ // special case
+ put_bits(&s->pb, 2, block[0] > 0 ? 2 : 3);
+ i = 1;
+ } else {
+ i = 0;
+ }
+
+ /* AC coefs */
+ last_index = s->block_last_index[n];
+ last_non_zero = i - 1;
+ for (; i <= last_index; i++) {
+ j = s->intra_scantable.permutated[i];
+ level = block[j];
+ if (level) {
+ run = i - last_non_zero - 1;
+ sign = 0;
+ slevel = level;
+ if (level < 0) {
+ sign = 1;
+ level = -level;
+ }
+ code = get_rl_index(rl, 0 /*no last in H.261, EOB is used*/,
+ run, level);
+ if (run == 0 && level < 16)
+ code += 1;
+ put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
+ if (code == rl->n) {
+ put_bits(&s->pb, 6, run);
+ av_assert1(slevel != 0);
+ av_assert1(level <= 127);
+ put_sbits(&s->pb, 8, slevel);
+ } else {
+ put_bits(&s->pb, 1, sign);
+ }
+ last_non_zero = i;
+ }
+ }
+ if (last_index > -1)
+ put_bits(&s->pb, rl->table_vlc[0][1], rl->table_vlc[0][0]); // EOB
+}
+
void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
int motion_x, int motion_y)
{
@@ -253,79 +323,6 @@ void ff_h261_encode_init(MpegEncContext *s)
s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
}
-/**
- * Encode an 8x8 block.
- * @param block the 8x8 block
- * @param n block index (0-3 are luma, 4-5 are chroma)
- */
-static void h261_encode_block(H261Context *h, int16_t *block, int n)
-{
- MpegEncContext *const s = &h->s;
- int level, run, i, j, last_index, last_non_zero, sign, slevel, code;
- RLTable *rl;
-
- rl = &ff_h261_rl_tcoeff;
- if (s->mb_intra) {
- /* DC coef */
- level = block[0];
- /* 255 cannot be represented, so we clamp */
- if (level > 254) {
- level = 254;
- block[0] = 254;
- }
- /* 0 cannot be represented also */
- else if (level < 1) {
- level = 1;
- block[0] = 1;
- }
- if (level == 128)
- put_bits(&s->pb, 8, 0xff);
- else
- put_bits(&s->pb, 8, level);
- i = 1;
- } else if ((block[0] == 1 || block[0] == -1) &&
- (s->block_last_index[n] > -1)) {
- // special case
- put_bits(&s->pb, 2, block[0] > 0 ? 2 : 3);
- i = 1;
- } else {
- i = 0;
- }
-
- /* AC coefs */
- last_index = s->block_last_index[n];
- last_non_zero = i - 1;
- for (; i <= last_index; i++) {
- j = s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- run = i - last_non_zero - 1;
- sign = 0;
- slevel = level;
- if (level < 0) {
- sign = 1;
- level = -level;
- }
- code = get_rl_index(rl, 0 /*no last in H.261, EOB is used*/,
- run, level);
- if (run == 0 && level < 16)
- code += 1;
- put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- if (code == rl->n) {
- put_bits(&s->pb, 6, run);
- av_assert1(slevel != 0);
- av_assert1(level <= 127);
- put_sbits(&s->pb, 8, slevel);
- } else {
- put_bits(&s->pb, 1, sign);
- }
- last_non_zero = i;
- }
- }
- if (last_index > -1)
- put_bits(&s->pb, rl->table_vlc[0][1], rl->table_vlc[0][0]); // EOB
-}
-
FF_MPV_GENERIC_CLASS(h261)
AVCodec ff_h261_encoder = {