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Diffstat (limited to 'libavcodec/mjpegenc.c')
-rw-r--r--libavcodec/mjpegenc.c168
1 files changed, 150 insertions, 18 deletions
diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c
index 6724310d98..c3ede0728d 100644
--- a/libavcodec/mjpegenc.c
+++ b/libavcodec/mjpegenc.c
@@ -8,20 +8,20 @@
* aspecting, new decode_frame mechanism and apple mjpeg-b support
* by Alex Beregszaszi
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -30,8 +30,6 @@
* MJPEG encoder.
*/
-#include <assert.h>
-
#include "libavutil/pixdesc.h"
#include "avcodec.h"
@@ -41,10 +39,44 @@
#include "mjpeg.h"
#include "mjpegenc.h"
+static uint8_t uni_ac_vlc_len[64 * 64 * 2];
+static uint8_t uni_chroma_ac_vlc_len[64 * 64 * 2];
+
+static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
+{
+ int i;
+
+ for (i = 0; i < 128; i++) {
+ int level = i - 64;
+ int run;
+ if (!level)
+ continue;
+ for (run = 0; run < 64; run++) {
+ int len, code, nbits;
+ int alevel = FFABS(level);
+
+ len = (run >> 4) * huff_size_ac[0xf0];
+
+ nbits= av_log2_16bit(alevel) + 1;
+ code = ((15&run) << 4) | nbits;
+
+ len += huff_size_ac[code] + nbits;
+
+ uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
+ // We ignore EOB as its just a constant which does not change generally
+ }
+ }
+}
+
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
{
MJpegContext *m;
+ if (s->width > 65500 || s->height > 65500) {
+ av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
+ return AVERROR(EINVAL);
+ }
+
m = av_malloc(sizeof(MJpegContext));
if (!m)
return AVERROR(ENOMEM);
@@ -70,13 +102,20 @@ av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance);
+ init_uni_ac_vlc(m->huff_size_ac_luminance, uni_ac_vlc_len);
+ init_uni_ac_vlc(m->huff_size_ac_chrominance, uni_chroma_ac_vlc_len);
+ s->intra_ac_vlc_length =
+ s->intra_ac_vlc_last_length = uni_ac_vlc_len;
+ s->intra_chroma_ac_vlc_length =
+ s->intra_chroma_ac_vlc_last_length = uni_chroma_ac_vlc_len;
+
s->mjpeg_ctx = m;
return 0;
}
-void ff_mjpeg_encode_close(MpegEncContext *s)
+av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
{
- av_free(s->mjpeg_ctx);
+ av_freep(&s->mjpeg_ctx);
}
static void encode_block(MpegEncContext *s, int16_t *block, int n)
@@ -122,7 +161,7 @@ static void encode_block(MpegEncContext *s, int16_t *block, int n)
mant--;
}
- nbits= av_log2(val) + 1;
+ nbits= av_log2_16bit(val) + 1;
code = (run << 4) | nbits;
put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
@@ -137,23 +176,90 @@ static void encode_block(MpegEncContext *s, int16_t *block, int n)
put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
}
-void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[8][64])
+void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
{
int i;
- for(i=0;i<5;i++) {
- encode_block(s, block[i], i);
- }
- if (s->chroma_format == CHROMA_420) {
+ if (s->chroma_format == CHROMA_444) {
+ encode_block(s, block[0], 0);
+ encode_block(s, block[2], 2);
+ encode_block(s, block[4], 4);
+ encode_block(s, block[8], 8);
encode_block(s, block[5], 5);
+ encode_block(s, block[9], 9);
+
+ if (16*s->mb_x+8 < s->width) {
+ encode_block(s, block[1], 1);
+ encode_block(s, block[3], 3);
+ encode_block(s, block[6], 6);
+ encode_block(s, block[10], 10);
+ encode_block(s, block[7], 7);
+ encode_block(s, block[11], 11);
+ }
} else {
- encode_block(s, block[6], 6);
- encode_block(s, block[5], 5);
- encode_block(s, block[7], 7);
+ for(i=0;i<5;i++) {
+ encode_block(s, block[i], i);
+ }
+ if (s->chroma_format == CHROMA_420) {
+ encode_block(s, block[5], 5);
+ } else {
+ encode_block(s, block[6], 6);
+ encode_block(s, block[5], 5);
+ encode_block(s, block[7], 7);
+ }
}
s->i_tex_bits += get_bits_diff(s);
}
+// maximum over s->mjpeg_vsample[i]
+#define V_MAX 2
+static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *pic_arg, int *got_packet)
+
+{
+ MpegEncContext *s = avctx->priv_data;
+ AVFrame *pic;
+ int i, ret;
+ int chroma_h_shift, chroma_v_shift;
+
+ av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
+
+ //CODEC_FLAG_EMU_EDGE have to be cleared
+ if(s->avctx->flags & CODEC_FLAG_EMU_EDGE)
+ return AVERROR(EINVAL);
+
+ if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Heights which are not a multiple of 16 might fail with some decoders, "
+ "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
+ av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
+ "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
+ return AVERROR_EXPERIMENTAL;
+ }
+
+ pic = av_frame_clone(pic_arg);
+ if (!pic)
+ return AVERROR(ENOMEM);
+ //picture should be flipped upside-down
+ for(i=0; i < 3; i++) {
+ int vsample = i ? 2 >> chroma_v_shift : 2;
+ pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
+ pic->linesize[i] *= -1;
+ }
+ ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
+ av_frame_free(&pic);
+ return ret;
+}
+
+#if CONFIG_MJPEG_ENCODER
+
+static const AVClass mjpeg_class = {
+ .class_name = "mjpeg encoder",
+ .item_name = av_default_item_name,
+ .option = ff_mpv_generic_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
AVCodec ff_mjpeg_encoder = {
.name = "mjpeg",
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
@@ -163,7 +269,33 @@ AVCodec ff_mjpeg_encoder = {
.init = ff_mpv_encode_init,
.encode2 = ff_mpv_encode_picture,
.close = ff_mpv_encode_end,
+ .capabilities = CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
+ .pix_fmts = (const enum AVPixelFormat[]){
+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE
+ },
+ .priv_class = &mjpeg_class,
+};
+#endif
+#if CONFIG_AMV_ENCODER
+static const AVClass amv_class = {
+ .class_name = "amv encoder",
+ .item_name = av_default_item_name,
+ .option = ff_mpv_generic_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_amv_encoder = {
+ .name = "amv",
+ .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_AMV,
+ .priv_data_size = sizeof(MpegEncContext),
+ .init = ff_mpv_encode_init,
+ .encode2 = amv_encode_picture,
+ .close = ff_mpv_encode_end,
.pix_fmts = (const enum AVPixelFormat[]){
- AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_NONE
+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE
},
+ .priv_class = &amv_class,
};
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 23:26:29 +0000