Typo in commit message: liavcodec should be libavcodec On 22 Jan 2024, at 20:14, Victor Luchits wrote:
> The bitrate option (-b:v) can now be used to specify the bit rate > of the video stream of the RoQ encoder. > > Original patch by Joseph Fenton aka Chilly Willy > > Signed-off-by: Victor Luchits <vluch...@gmail.com> > --- > Changelog | 1 + > libavcodec/roqvideo.h | 1 + > libavcodec/roqvideodec.c | 16 ++++++ > libavcodec/roqvideoenc.c | 107 +++++++++++++++++++++++++++++++++++---- > libavcodec/version.h | 2 +- > 5 files changed, 117 insertions(+), 10 deletions(-) > > diff --git a/Changelog b/Changelog > index c40b6d08fd..6974312f9d 100644 > --- a/Changelog > +++ b/Changelog > @@ -22,6 +22,7 @@ version <next>: > - ffmpeg CLI -bsf option may now be used for input as well as output > - ffmpeg CLI options may now be used as -/opt <path>, which is equivalent > to -opt <contents of file <path>> > +- RoQ video bit rate option support > version 6.1: > - libaribcaption decoder > diff --git a/libavcodec/roqvideo.h b/libavcodec/roqvideo.h > index 2c2e42884d..6d30bcaada 100644 > --- a/libavcodec/roqvideo.h > +++ b/libavcodec/roqvideo.h > @@ -43,6 +43,7 @@ typedef struct RoqContext { > AVFrame *last_frame; > AVFrame *current_frame; > int width, height; > + int key_frame; > roq_cell cb2x2[256]; > roq_qcell cb4x4[256]; > diff --git a/libavcodec/roqvideodec.c b/libavcodec/roqvideodec.c > index bfc69a65c9..b4ade3a43b 100644 > --- a/libavcodec/roqvideodec.c > +++ b/libavcodec/roqvideodec.c > @@ -70,6 +70,7 @@ static void roqvideo_decode_frame(RoqContext *ri, > GetByteContext *gb) > chunk_start = bytestream2_tell(gb); > xpos = ypos = 0; > + ri->key_frame = 1; > if (chunk_size > bytestream2_get_bytes_left(gb)) { > av_log(ri->logctx, AV_LOG_ERROR, "Chunk does not fit in input > buffer\n"); > @@ -92,12 +93,14 @@ static void roqvideo_decode_frame(RoqContext *ri, > GetByteContext *gb) > switch(vqid) { > case RoQ_ID_MOT: > + ri->key_frame = 0; > break; > case RoQ_ID_FCC: { > int byte = bytestream2_get_byte(gb); > mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8)); > my = 8 - (byte & 0xf) - ((signed char) chunk_arg); > ff_apply_motion_8x8(ri, xp, yp, mx, my); > + ri->key_frame = 0; > break; > } > case RoQ_ID_SLD: > @@ -125,12 +128,14 @@ static void roqvideo_decode_frame(RoqContext *ri, > GetByteContext *gb) > vqflg_pos--; > switch(vqid) { > case RoQ_ID_MOT: > + ri->key_frame = 0; > break; > case RoQ_ID_FCC: { > int byte = bytestream2_get_byte(gb); > mx = 8 - (byte >> 4) - ((signed char) (chunk_arg > >> 8)); > my = 8 - (byte & 0xf) - ((signed char) > chunk_arg); > ff_apply_motion_4x4(ri, x, y, mx, my); > + ri->key_frame = 0; > break; > } > case RoQ_ID_SLD: > @@ -214,6 +219,17 @@ static int roq_decode_frame(AVCodecContext *avctx, > AVFrame *rframe, > if ((ret = av_frame_ref(rframe, s->current_frame)) < 0) > return ret; > + > + /* Keyframe when no MOT or FCC codes in frame */ > + if (s->key_frame) { > + av_log(avctx, AV_LOG_VERBOSE, "\nFound keyframe!\n"); > + rframe->pict_type = AV_PICTURE_TYPE_I; > + avpkt->flags |= AV_PKT_FLAG_KEY; > + } else { > + rframe->pict_type = AV_PICTURE_TYPE_P; > + avpkt->flags &= ~AV_PKT_FLAG_KEY; > + } > + > *got_frame = 1; > /* shuffle frames */ > diff --git a/libavcodec/roqvideoenc.c b/libavcodec/roqvideoenc.c > index 0933abf4f9..68ec9ec238 100644 > --- a/libavcodec/roqvideoenc.c > +++ b/libavcodec/roqvideoenc.c > @@ -136,6 +136,8 @@ typedef struct RoqEncContext { > struct ELBGContext *elbg; > AVLFG randctx; > uint64_t lambda; > + uint64_t last_lambda; > + int lambda_delta; > motion_vect *this_motion4; > motion_vect *last_motion4; > @@ -887,8 +889,9 @@ static int generate_new_codebooks(RoqEncContext *enc) > return 0; > } > -static int roq_encode_video(RoqEncContext *enc) > +static int roq_encode_video(AVCodecContext *avctx) > { > + RoqEncContext *const enc = avctx->priv_data; > RoqTempData *const tempData = &enc->tmp_data; > RoqContext *const roq = &enc->common; > int ret; > @@ -910,14 +913,14 @@ static int roq_encode_video(RoqEncContext *enc) > /* Quake 3 can't handle chunks bigger than 65535 bytes */ > if (tempData->mainChunkSize/8 > 65535 && enc->quake3_compat) { > - if (enc->lambda > 100000) { > + if (enc->lambda > 100000000) { > av_log(roq->logctx, AV_LOG_ERROR, "Cannot encode video in Quake > compatible form\n"); > return AVERROR(EINVAL); > } > av_log(roq->logctx, AV_LOG_ERROR, > "Warning, generated a frame too big for Quake (%d > 65535), " > - "now switching to a bigger qscale value.\n", > - tempData->mainChunkSize/8); > + "now switching to a bigger qscale value (%d).\n", > + tempData->mainChunkSize/8, (int)enc->lambda); > enc->lambda *= 1.5; > tempData->mainChunkSize = 0; > memset(tempData->used_option, 0, sizeof(tempData->used_option)); > @@ -931,6 +934,80 @@ static int roq_encode_video(RoqEncContext *enc) > remap_codebooks(enc); > + /* bit rate control code - could make encoding very slow */ > + if (avctx->bit_rate) { > + /* a bit rate has been specified - try to match it */ > + int ftotal = (tempData->mainChunkSize / 8 + tempData->numCB2*6 + > tempData->numCB4*4) * avctx->time_base.den * 8; > + int64_t tol = avctx->bit_rate_tolerance; > + > + /* tolerance > bit rate, set to 5% of the bit rate */ > + if (tol > avctx->bit_rate) > + tol = avctx->bit_rate / 20; > + > + av_log(roq->logctx, AV_LOG_VERBOSE, > + "\nDesired bit rate (%d kbps), " > + "Bit rate tolerance (%d), " > + "Frame rate (%d)\n", > + (int)avctx->bit_rate, (int)tol, avctx->time_base.den); > + > + if (ftotal > (avctx->bit_rate + tol)) { > + /* frame is too big - increase qscale */ > + if (enc->lambda > 100000000) { > + av_log(roq->logctx, AV_LOG_ERROR, "\nCannot encode video at > desired bitrate\n"); > + return AVERROR(EINVAL); > + } > + enc->lambda_delta = enc->lambda_delta <= 0 ? 1 : > enc->lambda_delta < 65536 ? enc->lambda_delta*2 : 65536; > + enc->last_lambda = enc->lambda; > + enc->lambda += enc->lambda_delta; > + av_log(roq->logctx, AV_LOG_INFO, > + "\nGenerated a frame too big for desired bit rate (%d > kbps), " > + "now switching to a bigger qscale value (%d).\n", > + ftotal / 1000, (int)enc->lambda); > + tempData->mainChunkSize = 0; > + memset(tempData->used_option, 0, sizeof(tempData->used_option)); > + memset(tempData->codebooks.usedCB4, 0, > + sizeof(tempData->codebooks.usedCB4)); > + memset(tempData->codebooks.usedCB2, 0, > + sizeof(tempData->codebooks.usedCB2)); > + > + goto retry_encode; > + } else if (ftotal < (avctx->bit_rate - tol)) { > + /* frame is too small - decrease qscale */ > + if (enc->lambda <= 1) { > + av_log(roq->logctx, AV_LOG_WARNING, > + "\nGenerated a frame too small for desired bit rate > (%d kbps), " > + "qscale value cannot be lowered any further (%d).\n", > + ftotal / 1000, (int)enc->lambda); > + } else if ((enc->lambda - enc->last_lambda) == 1) { > + av_log(roq->logctx, AV_LOG_WARNING, > + "\nCannot find qscale that gives desired bit rate > within desired tolerance, " > + "using lower bitrate (%d kbps) with higher qscale > value (%d).\n", > + ftotal / 1000, (int)enc->lambda); > + } else { > + enc->lambda_delta = 0; > + if (enc->lambda == enc->last_lambda) { > + enc->lambda >>= 1; > + enc->last_lambda = enc->lambda; > + } else { > + enc->lambda = enc->last_lambda; > + //enc->lambda *= (float)(tempData->mainChunkSize * > avctx->time_base.den) / avctx->bit_rate; > + av_log(roq->logctx, AV_LOG_INFO, > + "\nGenerated a frame too small for desired bit > rate (%d kbps), " > + "reverting lambda and using smaller inc on qscale > (%d).\n", > + ftotal / 1000, (int)enc->lambda); > + } > + tempData->mainChunkSize = 0; > + memset(tempData->used_option, 0, > sizeof(tempData->used_option)); > + memset(tempData->codebooks.usedCB4, 0, > + sizeof(tempData->codebooks.usedCB4)); > + memset(tempData->codebooks.usedCB2, 0, > + sizeof(tempData->codebooks.usedCB2)); > + > + goto retry_encode; > + } > + } > + } > + > write_codebooks(enc); > reconstruct_and_encode_image(enc, roq->width, roq->height, > @@ -991,8 +1068,11 @@ static av_cold int roq_encode_init(AVCodecContext > *avctx) > roq->width = avctx->width; > roq->height = avctx->height; > + enc->lambda = 2*ROQ_LAMBDA_SCALE; > enc->framesSinceKeyframe = 0; > enc->first_frame = 1; > + enc->last_lambda = 1; > + enc->lambda_delta = 0; > roq->last_frame = av_frame_alloc(); > roq->current_frame = av_frame_alloc(); > @@ -1059,10 +1139,13 @@ static int roq_encode_frame(AVCodecContext *avctx, > AVPacket *pkt, > enc->frame_to_enc = frame; > - if (frame->quality) > - enc->lambda = frame->quality - 1; > - else > - enc->lambda = 2*ROQ_LAMBDA_SCALE; > + if (avctx->bit_rate) { > + /* no specific bit rate desired, use frame quality */ > + if (frame->quality) > + enc->lambda = frame->quality - 1; > + else > + enc->lambda = 2*ROQ_LAMBDA_SCALE; > + } > /* 138 bits max per 8x8 block + > * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header > */ > @@ -1089,7 +1172,7 @@ static int roq_encode_frame(AVCodecContext *avctx, > AVPacket *pkt, > } > /* Encode the actual frame */ > - ret = roq_encode_video(enc); > + ret = roq_encode_video(avctx); > if (ret < 0) > return ret; > @@ -1115,6 +1198,11 @@ static const AVClass roq_class = { > .version = LIBAVUTIL_VERSION_INT, > }; > +static const FFCodecDefault roq_defaults[] = { > + { "b", "0" }, > + { NULL }, > +}; > + > const FFCodec ff_roq_encoder = { > .p.name = "roqvideo", > CODEC_LONG_NAME("id RoQ video"), > @@ -1129,4 +1217,5 @@ const FFCodec ff_roq_encoder = { > AV_PIX_FMT_NONE }, > .p.priv_class = &roq_class, > .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, > + .defaults = roq_defaults, > }; > diff --git a/libavcodec/version.h b/libavcodec/version.h > index 376388c5bb..581151cda7 100644 > --- a/libavcodec/version.h > +++ b/libavcodec/version.h > @@ -30,7 +30,7 @@ > #include "version_major.h" > #define LIBAVCODEC_VERSION_MINOR 37 > -#define LIBAVCODEC_VERSION_MICRO 100 > +#define LIBAVCODEC_VERSION_MICRO 101 > #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ > LIBAVCODEC_VERSION_MINOR, \ > -- > 2.25.1 > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".