Merge commit '328cd2b599bc2d0d38f3c12606fa2a66eeec016e'

* commit '328cd2b599bc2d0d38f3c12606fa2a66eeec016e':
  lavc: move encoding-related code from utils.c to a new file

Merged-by: James Almer <jamrial@gmail.com>

1 files changed, 454 insertions, 0 deletions

diff --git a/libavcodec/encode.c b/libavcodec/encode.c
new file mode 100644
index 0000000000..6e9d487306
--- /dev/null
+++ b/libavcodec/encode.c
@@ -0,0 +1,454 @@
+/*
+ * generic encoding-related code
+ *
+ * This file is part of FFmpeg.
+ *
+ * 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.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/avassert.h"
+#include "libavutil/frame.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "libavutil/samplefmt.h"
+
+#include "avcodec.h"
+#include "frame_thread_encoder.h"
+#include "internal.h"
+
+int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
+{
+    if (avpkt->size < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid negative user packet size %d\n", avpkt->size);
+        return AVERROR(EINVAL);
+    }
+    if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid minimum required packet size %"PRId64" (max allowed is %d)\n",
+               size, INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx && 2*min_size < size) { // FIXME The factor needs to be finetuned
+        av_assert0(!avpkt->data || avpkt->data != avctx->internal->byte_buffer);
+        if (!avpkt->data || avpkt->size < size) {
+            av_fast_padded_malloc(&avctx->internal->byte_buffer, &avctx->internal->byte_buffer_size, size);
+            avpkt->data = avctx->internal->byte_buffer;
+            avpkt->size = avctx->internal->byte_buffer_size;
+        }
+    }
+
+    if (avpkt->data) {
+        AVBufferRef *buf = avpkt->buf;
+
+        if (avpkt->size < size) {
+            av_log(avctx, AV_LOG_ERROR, "User packet is too small (%d < %"PRId64")\n", avpkt->size, size);
+            return AVERROR(EINVAL);
+        }
+
+        av_init_packet(avpkt);
+        avpkt->buf      = buf;
+        avpkt->size     = size;
+        return 0;
+    } else {
+        int ret = av_new_packet(avpkt, size);
+        if (ret < 0)
+            av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
+        return ret;
+    }
+}
+
+int ff_alloc_packet(AVPacket *avpkt, int size)
+{
+    return ff_alloc_packet2(NULL, avpkt, size, 0);
+}
+
+/**
+ * Pad last frame with silence.
+ */
+static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
+{
+    AVFrame *frame = NULL;
+    int ret;
+
+    if (!(frame = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+
+    frame->format         = src->format;
+    frame->channel_layout = src->channel_layout;
+    av_frame_set_channels(frame, av_frame_get_channels(src));
+    frame->nb_samples     = s->frame_size;
+    ret = av_frame_get_buffer(frame, 32);
+    if (ret < 0)
+        goto fail;
+
+    ret = av_frame_copy_props(frame, src);
+    if (ret < 0)
+        goto fail;
+
+    if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
+                               src->nb_samples, s->channels, s->sample_fmt)) < 0)
+        goto fail;
+    if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
+                                      frame->nb_samples - src->nb_samples,
+                                      s->channels, s->sample_fmt)) < 0)
+        goto fail;
+
+    *dst = frame;
+
+    return 0;
+
+fail:
+    av_frame_free(&frame);
+    return ret;
+}
+
+int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
+                                              AVPacket *avpkt,
+                                              const AVFrame *frame,
+                                              int *got_packet_ptr)
+{
+    AVFrame *extended_frame = NULL;
+    AVFrame *padded_frame = NULL;
+    int ret;
+    AVPacket user_pkt = *avpkt;
+    int needs_realloc = !user_pkt.data;
+
+    *got_packet_ptr = 0;
+
+    if (!avctx->codec->encode2) {
+        av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
+        return AVERROR(ENOSYS);
+    }
+
+    if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
+        av_packet_unref(avpkt);
+        av_init_packet(avpkt);
+        return 0;
+    }
+
+    /* ensure that extended_data is properly set */
+    if (frame && !frame->extended_data) {
+        if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
+            avctx->channels > AV_NUM_DATA_POINTERS) {
+            av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
+                                        "with more than %d channels, but extended_data is not set.\n",
+                   AV_NUM_DATA_POINTERS);
+            return AVERROR(EINVAL);
+        }
+        av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
+
+        extended_frame = av_frame_alloc();
+        if (!extended_frame)
+            return AVERROR(ENOMEM);
+
+        memcpy(extended_frame, frame, sizeof(AVFrame));
+        extended_frame->extended_data = extended_frame->data;
+        frame = extended_frame;
+    }
+
+    /* extract audio service type metadata */
+    if (frame) {
+        AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
+        if (sd && sd->size >= sizeof(enum AVAudioServiceType))
+            avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
+    }
+
+    /* check for valid frame size */
+    if (frame) {
+        if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
+            if (frame->nb_samples > avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "more samples than frame size (avcodec_encode_audio2)\n");
+                ret = AVERROR(EINVAL);
+                goto end;
+            }
+        } else if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
+            if (frame->nb_samples < avctx->frame_size &&
+                !avctx->internal->last_audio_frame) {
+                ret = pad_last_frame(avctx, &padded_frame, frame);
+                if (ret < 0)
+                    goto end;
+
+                frame = padded_frame;
+                avctx->internal->last_audio_frame = 1;
+            }
+
+            if (frame->nb_samples != avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d) (avcodec_encode_audio2)\n", frame->nb_samples, avctx->frame_size);
+                ret = AVERROR(EINVAL);
+                goto end;
+            }
+        }
+    }
+
+    av_assert0(avctx->codec->encode2);
+
+    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
+    if (!ret) {
+        if (*got_packet_ptr) {
+            if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
+                if (avpkt->pts == AV_NOPTS_VALUE)
+                    avpkt->pts = frame->pts;
+                if (!avpkt->duration)
+                    avpkt->duration = ff_samples_to_time_base(avctx,
+                                                              frame->nb_samples);
+            }
+            avpkt->dts = avpkt->pts;
+        } else {
+            avpkt->size = 0;
+        }
+    }
+    if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
+        needs_realloc = 0;
+        if (user_pkt.data) {
+            if (user_pkt.size >= avpkt->size) {
+                memcpy(user_pkt.data, avpkt->data, avpkt->size);
+            } else {
+                av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
+                avpkt->size = user_pkt.size;
+                ret = -1;
+            }
+            avpkt->buf      = user_pkt.buf;
+            avpkt->data     = user_pkt.data;
+        } else {
+            if (av_dup_packet(avpkt) < 0) {
+                ret = AVERROR(ENOMEM);
+            }
+        }
+    }
+
+    if (!ret) {
+        if (needs_realloc && avpkt->data) {
+            ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
+            if (ret >= 0)
+                avpkt->data = avpkt->buf->data;
+        }
+
+        avctx->frame_number++;
+    }
+
+    if (ret < 0 || !*got_packet_ptr) {
+        av_packet_unref(avpkt);
+        av_init_packet(avpkt);
+        goto end;
+    }
+
+    /* NOTE: if we add any audio encoders which output non-keyframe packets,
+     *       this needs to be moved to the encoders, but for now we can do it
+     *       here to simplify things */
+    avpkt->flags |= AV_PKT_FLAG_KEY;
+
+end:
+    av_frame_free(&padded_frame);
+    av_free(extended_frame);
+
+#if FF_API_AUDIOENC_DELAY
+    avctx->delay = avctx->initial_padding;
+#endif
+
+    return ret;
+}
+
+int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
+                                              AVPacket *avpkt,
+                                              const AVFrame *frame,
+                                              int *got_packet_ptr)
+{
+    int ret;
+    AVPacket user_pkt = *avpkt;
+    int needs_realloc = !user_pkt.data;
+
+    *got_packet_ptr = 0;
+
+    if (!avctx->codec->encode2) {
+        av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
+        return AVERROR(ENOSYS);
+    }
+
+    if(CONFIG_FRAME_THREAD_ENCODER &&
+       avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))
+        return ff_thread_video_encode_frame(avctx, avpkt, frame, got_packet_ptr);
+
+    if ((avctx->flags&AV_CODEC_FLAG_PASS1) && avctx->stats_out)
+        avctx->stats_out[0] = '\0';
+
+    if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
+        av_packet_unref(avpkt);
+        av_init_packet(avpkt);
+        avpkt->size = 0;
+        return 0;
+    }
+
+    if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
+        return AVERROR(EINVAL);
+
+    if (frame && frame->format == AV_PIX_FMT_NONE)
+        av_log(avctx, AV_LOG_WARNING, "AVFrame.format is not set\n");
+    if (frame && (frame->width == 0 || frame->height == 0))
+        av_log(avctx, AV_LOG_WARNING, "AVFrame.width or height is not set\n");
+
+    av_assert0(avctx->codec->encode2);
+
+    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
+    av_assert0(ret <= 0);
+
+    emms_c();
+
+    if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
+        needs_realloc = 0;
+        if (user_pkt.data) {
+            if (user_pkt.size >= avpkt->size) {
+                memcpy(user_pkt.data, avpkt->data, avpkt->size);
+            } else {
+                av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
+                avpkt->size = user_pkt.size;
+                ret = -1;
+            }
+            avpkt->buf      = user_pkt.buf;
+            avpkt->data     = user_pkt.data;
+        } else {
+            if (av_dup_packet(avpkt) < 0) {
+                ret = AVERROR(ENOMEM);
+            }
+        }
+    }
+
+    if (!ret) {
+        if (!*got_packet_ptr)
+            avpkt->size = 0;
+        else if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
+            avpkt->pts = avpkt->dts = frame->pts;
+
+        if (needs_realloc && avpkt->data) {
+            ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
+            if (ret >= 0)
+                avpkt->data = avpkt->buf->data;
+        }
+
+        avctx->frame_number++;
+    }
+
+    if (ret < 0 || !*got_packet_ptr)
+        av_packet_unref(avpkt);
+
+    return ret;
+}
+
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub)
+{
+    int ret;
+    if (sub->start_display_time) {
+        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
+        return -1;
+    }
+
+    ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
+    avctx->frame_number++;
+    return ret;
+}
+
+static int do_encode(AVCodecContext *avctx, const AVFrame *frame, int *got_packet)
+{
+    int ret;
+    *got_packet = 0;
+
+    av_packet_unref(avctx->internal->buffer_pkt);
+    avctx->internal->buffer_pkt_valid = 0;
+
+    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+        ret = avcodec_encode_video2(avctx, avctx->internal->buffer_pkt,
+                                    frame, got_packet);
+    } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
+        ret = avcodec_encode_audio2(avctx, avctx->internal->buffer_pkt,
+                                    frame, got_packet);
+    } else {
+        ret = AVERROR(EINVAL);
+    }
+
+    if (ret >= 0 && *got_packet) {
+        // Encoders must always return ref-counted buffers.
+        // Side-data only packets have no data and can be not ref-counted.
+        av_assert0(!avctx->internal->buffer_pkt->data || avctx->internal->buffer_pkt->buf);
+        avctx->internal->buffer_pkt_valid = 1;
+        ret = 0;
+    } else {
+        av_packet_unref(avctx->internal->buffer_pkt);
+    }
+
+    return ret;
+}
+
+int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
+{
+    if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
+        return AVERROR(EINVAL);
+
+    if (avctx->internal->draining)
+        return AVERROR_EOF;
+
+    if (!frame) {
+        avctx->internal->draining = 1;
+
+        if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
+            return 0;
+    }
+
+    if (avctx->codec->send_frame)
+        return avctx->codec->send_frame(avctx, frame);
+
+    // Emulation via old API. Do it here instead of avcodec_receive_packet, because:
+    // 1. if the AVFrame is not refcounted, the copying will be much more
+    //    expensive than copying the packet data
+    // 2. assume few users use non-refcounted AVPackets, so usually no copy is
+    //    needed
+
+    if (avctx->internal->buffer_pkt_valid)
+        return AVERROR(EAGAIN);
+
+    return do_encode(avctx, frame, &(int){0});
+}
+
+int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    av_packet_unref(avpkt);
+
+    if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
+        return AVERROR(EINVAL);
+
+    if (avctx->codec->receive_packet) {
+        if (avctx->internal->draining && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
+            return AVERROR_EOF;
+        return avctx->codec->receive_packet(avctx, avpkt);
+    }
+
+    // Emulation via old API.
+
+    if (!avctx->internal->buffer_pkt_valid) {
+        int got_packet;
+        int ret;
+        if (!avctx->internal->draining)
+            return AVERROR(EAGAIN);
+        ret = do_encode(avctx, NULL, &got_packet);
+        if (ret < 0)
+            return ret;
+        if (ret >= 0 && !got_packet)
+            return AVERROR_EOF;
+    }
+
+    av_packet_move_ref(avpkt, avctx->internal->buffer_pkt);
+    avctx->internal->buffer_pkt_valid = 0;
+    return 0;
+}